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See Bong (disambiguation) for other uses of the word bong

A bong (shown right), also commonly known as a water pipe, is a device used to smoke substances, typically Tobacco or cannabis. The bong and its many technological elaborations are prominent social artifacts of the international body of tobacco culture.

Bongs can vary greatly in their shape, materials, styles, colors, and sizes. Many bongs are regarded for their style, distinct vivid colors, or customizations such as stickers, and become a personalized signature of that particular bong owner.

Basic Structure

A conventional bong, shown right, is comprised of five basic components. These components are listed below:
1. The mouthpiece is where the user places his or her mouth, sealing the chamber from the air and allowing him or her to inhale smoke. The mouth piece is usually positioned at the top of the chamber.
2. The chamber is a container in which smoke collects before inhalation. Conventionally, the chamber forms the structure’s bulk and is often a tall, hollow cylinder with a large internal capacity. The chamber is often slightly angled to make the mouthpiece more accessible.
3. The base, so called because of its location, contains the water that the smoke is sucked through. Usually the base is wider than the chamber so that, when filled, the structure is more stable. Some bongs, including the one shown to the right, have additional footings to make the structure more stable.
4. The stem, also known as the slide, is a tube that passes through the wall of the chamber, connecting the bowl to the base. The stem should go right to the bottom of the base, meaning the smoke must travel the greatest possible distance through the water before it reaches the chamber. This allows for greater cooling and purification of the smoke. The stem may be removable or it may be integrated into the chamber wall. Removable stems are easier to clean but integrated stems reduce the amount of “clean” air entering the chamber.
5. The bowl (also known as "cone piece," "head piece," or "chillum") is usually a removable cup- or cone-shaped container made of either metal, glass, wood, or ceramic. The substance being smoked is packed into the bowl and ignited. The bowl is placed in the upper opening of the stem. The bowl forms a seal around the stem preventing “clean” air from entering the chamber.
These are the conventional components of a bong. It should be noted that a great number of variations and adaptations exist. For example, the most minimalistic bongs contain only a combination mouthpiece/chamber and bowl/stem.

Using a Bong

Smoking using a bong contrasts with smoking using a pipe or cigarette in two major ways. Bongs cool the smoke before it enters the user’s lungs and a large amount of smoke is inhaled quickly as opposed to the smaller, more frequent, inhalations of pipe and cigarette smoking.

1. The base is filled with water to the depth dictated by the bong. Water quality can include use of tap water, which may promote mineral buildup, or distilled water, which deposits less residue on the smoking equipment and is easier on lungs. Sometimes other liquids are used, e.g., lime water, giving the smoke a different taste. More rarely, liquids like Coca-Cola and herbal teas are used. However, such liquids can make cleaning difficult and time-consuming.

2. The substance to be smoked is packed into the bowl and ignited. Cigarette lighters and matches are commonly used for ignition. Packing the bowl is a balance between filling it with enough substance to create a useful amount of smoke and leaving enough room for air to be sucked through the substance.

3. The user places his/her lips on the mouth piece, forming a seal, and inhales. An inhalation is known as a "hit." If the smoker is using a larger bong, the first hit contains no smoke; this type of hit is known as a "dry hit." Its purpose is to draw the clean air out of the chamber and to start drawing in smoke from the bowl. If a smaller bong is being used, the first hit should consume all the potential smoke. If two inhalations are made, this is known as a "double hit" and is considered poor bong etiquette.

4. Once enough smoke has collected in the chamber, the smoker inhales sharply, drawing the smoke into his/her lungs.

Steps 3 & 4 can be repeated until the substance has been completely burned.

There is a fifth step that is not entirely necessary in using a bong. In many bongs, when the user feels that he/she has inhaled a satisfactory amount of smoke, he/she can pull the bowl out of the bong to introduce "clean" air. This is known as "carbing", "clearing" or "pulling the carb." This conserves the substance, should it still have a remaining usable portion left in the bowl. This also clears smoke from the chamber, so that old, or "stale," smoke is not inhaled by the next user of the bong. Another effect some notice is that the hit has a stronger effect on the user when this technique is done correctly.

Step 5 can be repeated along with steps 3 & 4.

Physical Principles

When inhaling, the volume of the lungs increases, causing the air in the lungs to decrease in pressure. The air in the lungs is then at a lower pressure than the air in the atmosphere. The pressure difference causes a flow of air from outside of the bong through the bowl picking up smoke from the burning herb. The smoke then bubbles through water and on into the chamber where it is temporarily held. Once enough smoke is in the chamber, the hole above the water level is uncovered and the smoke is inhaled into the lungs. Once in the lungs, the active chemicals in the smoke are absorbed into the blood stream.

The smoke initially travels through a hollow pipe that is attached to the bottom of the bowl containing the raw herb. The pipe enters into the side of a large vessel containing water. The hole in the side of this container is airtight, and the bottom of the pipe is submerged in the water. The flow of air increases the burn temperature of the herb and chemicals are vaporized into the air stream.

The water is the most important part of the process. The water has two roles: 1) It acts as a solvent for undesirable chemicals present in the smoke, and 2) It acts as a coolant. After a few uses the water turns into an unpleasant bitter smelling solution having absorbed water soluble chemicals and large particulates from the smoke.

Once the smoke has risen through the water, it is trapped in the air gap above the water. The empty space of the container fills up with cool filtered smoke. At the side of the container above the water level, there is a small hole which is kept covered up with a finger until the point when sufficient smoke has been held in the air gap. This hole is sometimes known as a shotgun hole. Its purpose is to allow an easy passage of air into the container when the smoke is finally inhaled into the lungs. The fresh air from the shotgun hole also further helps to cool the smoke as it is inhaled.

Motivations for use

The motivations for use are three fold:

• Smoke palatability
• Efficiency of dosage
• Health benefits

Efficiency of dosage

By making the smoke cooler and more palatable it allows the dose of active chemical to be inhaled more deeply and rapidly. This makes absorption of the active chemical more efficient and so less of the original herb is required. The maximum amount of smoke that can be inhaled in a single hit depends on the bong's chamber capacity. Normally, this amount of smoke is far greater than can be achieved when smoking a pipe, cigarette, or spliff. The bong can also give a stronger hit than other smoking methods.

If a smoker uses too much substance or collects too much smoke or uses a substance that is destroyed by high temperatures, bongs can still prove wasteful, as the excess smoke is often lost to the atmosphere. The longer the smoker can hold the hit in, the more efficient the absorption into the blood stream. The act of holding in a hit to the length in which the exhale contains no smoke is known as "zeroing it" or taking a "ghost hit." An exceptionally large and dense hit is known as a "monster hit" or a "fatty rip."

Health Benefits/Research

Bongs bubble the smoke through water, which cools it down. This helps to reduce the chance of burning to the mouth, airways, and lungs. The water can trap some heavier particles and the more water-soluble molecules, preventing them from entering the smoker's lungs.

Most smokers believe that bongs are healthier than other smoking methods; however, a 2000 NORML-MAPS study found that "water pipes filter out more psychoactive THC than they do other tars, thereby requiring users to smoke more to reach their desired effect" . Smoke from marijuana supplied by the NIDA was drawn through a number of smoking devices and analyzed. A smoking machine, adjusted to mimic the puff length of marijuana smokers, drew smoke through a standard bong, a small portable bong with a folding stem, a bong with a motorized paddle that thoroughly mix the smoke with the water, and two different types of vaporizers. The study found that the unfiltered joint outperformed all devices except the vaporizers, with a ratio of about 1 part cannabinoids to 13 parts tar.

However, MAPS reviewed a study that examined the effects and composition of water filtered and non-filtered cannabis and tobacco smoke. It found that when alveolar macrophages, an important component in the lungs immune system, were exposed to unfiltered smoke, there was a marked reduction in the macrophages' ability to fight bacteria, whereas there was no such reduction in those exposed to water filtered smoke. It also found that there is substantial epidemiological evidence among tobacco smokers that those who smoke through water-pipes, as opposed to cigarettes, cigars, and regular pipes, have lower incidences of carcinoma. "It appears that water filtration can be effective in removing components from cannabis smoke that are known toxicants... The effectiveness of toxicant removal is related to the smoke's water contact area. Specially designed water pipes, incorporating particulate filters and gas dispersion frits, would likely be most effective in this regard; the gas dispersion frit serves to break up the smoke into very fine bubbles, thereby increasing its water contact area." This study suggests that a bong's smoke is less harmful than unfiltered smoke.

Cleaning

Bongs become dirty and smell with use. Tars accumulate in the bowl, bowl stem, stem, chamber, and base. The tars can be scraped out and re-combusted as they can contain large quantities of water-insoluble THC.

Most bongs can be cleaned easily without expensive commercial bong cleaning kits and solutions. While a plastic bong should not be cleaned in a dishwasher, many other techniques, such as scrubbing the interior with a brush, produce good results. Glass bongs can cleaned with 99% Propan-2-ol (Isopropyl alcohol) as it remove residue well. (Alcohol should not be used with acrylic bongs as they will shatter.) When cleaning a bong, pour alcohol mixed with salt (larger and coarser granules are better) or rice, cover any holes, and shake/stir the solution around. Pour out and repeat if necessary. Once finished, rinse the bong out with hot running water. A bong can also be soaked in alcohol overnight to remove more difficult residue.

Q-tips or other similar devices, such as cotton swabs, can be used to clean a bong with without opening it and making a mess. This method also works well with glass pipes.

Bong water

When a bong is not properly maintained, especially in regards to cleaning, the water used to filter and cool the smoke can take on many undesirable characteristics. These effects can include simple discoloration in the form of a green then brown and eventually black tint. Some waters, such as municipal tap, contain minerals that can promote residue buildup, making distilled water preferable. In addition, as a bong is smoked, often ash is sucked through the stem where it rests in the bong water. Therefore, used bong water should be emptied after, at most, only a few sessions' worth of smoking. Some users prefer clean water for every session or hit.

Additives, such as flavored drinks and alcoholic beverages, are common in place of water; however, certain chemicals bond easily to alcohol and could reduce the effect of the substances contained within certain strains of tobacco and cannabis. Additionally, there is a minute risk of fire when using flammable substances in place of water. A certain lung disfunction can occur when using relatively cold water.

Finally, there are energy drinks advertised as "bong water." These often add flavor while containing very few other properties.

Materials

Bongs can vary greatly in their shape, material, style, color, and size. Commonly constructed from metal, acrylic, ceramic, or glass, bongs can also be fabricated from materials as diverse as pykrete or even from household objects such as empty water bottles. Some people even make bongs out of fruits and vegetables that are discarded after use. Many bongs are regarded for their style, distinct vivid colors, or customizations such as stickers, and become a personalized signature of that particular owner. Some people even name their bongs. These names usually reflect cannabis culture or some particular distinction of the bong.

Since the bong is such a simple device, it can be constructed out of nearly anything that is at least semi-rigid and can be made airtight. This includes, but is not limited to, bamboo, plastic bottles, soda-pop cans, buckets, vases, beer bottles, hollow plastic and ceramic statues, chemistry beakers, snorkels, even apples and potatoes. However, care should be taken, as burning plastics results in the production of dangerous toxins. Most bongs purchased will be made out of glass (either hand-blown or cast in molds) or clear acrylic tubing. Most of these bongs will include or otherwise utilize glass stems and bowls. However, cheaper bongs (nearly all made out of acrylic) may be designed with metal stems and bowls.

A common home-built bong is made from a bowl and stem purchased either from a head shop or a hardware store, or fabricated from supplies around the house. (A bong can be assembled out of tinfoil and a short length of garden hose, for instance.) The rest of the design needs nothing more than a knife or scissors, a 20 oz to 1 liter empty plastic bottle, and some duct tape. Just because a bong can be constructed this way does not indicate it is a good idea. To avoid dangerous fumes and chemicals, all bowls and stems should be made of glass or metal, and the chambers of the bongs of glass, metal, or acrylic.

Materials such as PVC, plastic, rubber, or garden hoses may emit toxic chemicals when heated. Aluminum has been linked with Alzheimer's disease but research in this area has been inconclusive (see the appropriate references. Plastic can release fumes which may induce asthma. Little has been documented on the inhalation of these fumes but the practice should be avoided. Duct tape may release rubber, metal, and aluminum fumes.

Variety

Offshoots from the simple bong concept do exist. These devices either bubble the smoke through water to cool it or have very large chambers. Some of the devices are designed to allow slower, more controlled draws through the bowl, causing the smoke to be much denser. Other bongs even have attachments for vaporizers.

Carburetor

The majority of bongs have a small hole, called a carburetor or carb (also called a shotty (from 'shotgun'), choke, clutch, or rush (hole)), in the chamber across from the stem. This is simply a valve that the user places his/her finger over when inhaling, allowing the chamber to fill up with smoke. If the user releases the carburetor, then he/she is no longer having to pull the smoke through the downpipe and water so it is easier or more relaxing to smoke. Some bong users allow fresh air to rush rapidly in through the hole. The fresh air mixes with the smoke and forces the smoke into the user's lungs more rapidly than could be achieved through normal inhalation. Inhaling a lung full of smoke is known as a hit. Often, bongs are smoked in two hits; first a "lit hit" when smoke is allowed to fill the chamber, then, after a short break, the "chamber hit" or the "clear," when the user inhales smoke.

Carburetor hole bongs use a hole to release the vacuum which allows air into the chamber. This has the effect of clearing the chamber of the smoke which is inhaled into the lungs. This method prevents the need to fill the chamber with carbon dioxide to clear the smoke before it becomes stale. They are easy to construct and often used in home-made bongs.

Slide

Slide bongs have two piece downstems. One is attached to the bong itself and the other, with the bowl, slides into that one using a smaller diameter. To use, you pull out the second piece by the bowl.

Zong

A zong is the same as a bong, but has one or more kinks in the neck. The kinks allow the zong to have the same smoke capacity as that of a taller bong, but in a shorter and sometimes more interesting looking package. The kinks also prevent water from splashing on the smoker's mouth. Zongs are typically made of glass, and can vary in number of kinks and diameters. Ice can also be added in the zong neck, getting trapped at a kink, and cooling the smoke for the user. (For more on ice bongs, see below.) Zongs are usually more expensive than regular bongs due to the more complex shape.

Ice Bong

One of the most common variety is the ice bong, which is a sub variety of a slide or carburetor bong. These are typically made of glass or acrylic, like this one to the right. Ice is placed in a twist or ice trap in the neck. This has the effect of cooling the smoke when the user comes to inhaling. These bongs are typically bright colors and are popular due to the durability, ease of use, and controllability. They usually have carburetor holes on the opposite side to the bowl or slightly to the left or right of that position. These tend to have larger chambers than other bong varieties, as ice is used rarely in smaller bongs.

Bubbler

A bubbler is a small bong that can be operated with only one hand (aside from having to provide an ignition source). In these devices, the stem is internal and the bowl is at the very top. A majority of the bong is enclosed with only a hole in the side to act as the carburetor and the hole the smoke will exit on its way to the user. These operate very much like a pipe since their internal chamber is so small but they have identical parts to a common bong. They are considered more pleasant to smoke out of than a regular pipe because the smoke is cooled through the water and filtered.

Vaporizer-Bong

A vaporizer-bong, or "vapor-bong," is the use of a box type vaporizer or heat gun and a bong connected via a special glass attachment. The vapor goes through the attachment, filters through the water, and may pass through a layer of ice - creating an ice-cold, vaporized hit of herbal material.

Popper

A popper, also called a shotty, is made out of a plastic bottle and is similar to a bong but lacks the bowl. The bottle should be made from a firm and rigid bottle, so as not to buckle from the force of 'shooting' the shotty. A good example is a soft drinks bottle or bottle that used to contain carbonated drinks, as these have to be stronger than water bottles to maintain their shape under pressure. A small hole is burnt in the bottle about one quarter of the way up. A pipe is pushed into this hole at a downward angle while still warm, ensuring an airtight fit as the molten plastic cools around the pipe. The pipe used can be made from materials such as metal wind chimes, tubular aerials, and bong pipes with the bowl unscrewed. A shotty is performed in much the same way as a bong, except a rush-hole is not required, as when it is "shot" or smoked the mixture in the pipe falls into the water, allowing air to enter quickly. One way people do this is by cutting 1cm off a cigarette and putting it in sideways into the piece then packing cannabis on top by stamping the piece into a cannabis covered flat surface. One could also take a flattened piece of tobacco and maneuver it into the top of the tube; again, the substance is added on top. When the user smokes a popper, he/she lights the substance and breathe slowly. Then, when the cigarette underneath begins to burn, he/she inhales as hard as he/she can, creating a "pop."

Backy/Chop-Bong/Roppie

This form of bong is similar to a popper but where no bowl is used on the former, a small conical bowl (with its wide end slightly wider than the stem being used and its narrow end considerably smaller), known as a 'drop-in cone,' is placed at (not fixed to, hence 'drop in') the end of the stem. This type of cone has a fairly small hole at one end and does not require a gauze.

Use: Cannabis is chopped until very fine, most often with some tobacco (hence 'backy-bong') so that the 'chop' will burn rapidly. (Some users also prefer the flavor and/or 'buzz' of a cannabis/tobacco mix.) The chop is then placed in the cone and ignited while the user sucks slowly (it is best to keep the ignition source on the mix for as short a time as possible in order to keep the heat of the smoke to a minimum) until the entire surface of the mix is burning. The user will then suck as hard as he/she can, pulling the burning material into the chop below it and thus igniting it, until all the chop is burnt to ash and has been sucked through the narrow end of the cone. The cone is then pulled from the stem (be careful, as it can get very hot after multiple uses in close succession), allowing the stem to act as a 'carb'/'rush'/'shotty.'

Gravity Bong

A gravity bong (also known as bucket bongs,Hydros, buckets, g-bongs, GBs, sinkers, torpedoes, depth-charges, aqualungs, or turbos) does not necessarily filter the smoke through water but instead uses water to generate a slow and constant vacuum in the chamber. This offers the same benefit of delivering a concentrated charge of smoke to the user but is much more effective at making the smoke denser, thereby causing more chemicals to be absorbed. These devices are known for inducing massive coughing fits in their users and can be very unpleasant to use, but can allow a user on a tight budget to conserve his/her substance and still get high. People sometimes filter smoke through the water by inserting a makeshift stem (i.e., a pipe the length of the bucket) from the bowl into a bucket of water.

Another variation of the gravity bong is the reverse gravity bong, also known as a "waterfall." A waterfall is made by punching a hole in the bottom of a large container (usually measuring at least one gallon) and attaching a bowl piece to the top of the container in the place of its lid. Some people may make the bowl out of the lid or a piece of aluminum foil. The container is filled (the hole being covered). Once it is filled, the bowl is placed on top, the substance is lit, and the water is drained. This creates a vacuum effect and pulls the smoke into the container. Once the water is done draining, the smoke is inhaled. A "SoBe bong" is a waterfall made from a glass SoBe bottle. (These bottles are often used because the manufacturing process creates an indentation near the bottom, which can easily be knocked out to form a drain hole.)

Another variation of the waterfall consists of a .5 liter water bottle and a metal 4mm (or around) socket wrench bit. The bit is placed in a pre drilled (or burned) hole in the cap of the water bottle. The substance (usually no more than .2 gram) is then placed in the metal bit. A hole is cut or burned into the bottom section on the side of the water bottle, the bottle is filled with liquid, top is replaced and the substance is lit, and the bottle is drained.

See also

• Hookah
• Chalice (pipe)
• Head shop
• Vaporizer
• List of bong patents
• Tobacco
• 420 (cannabis culture)
• Audio sample of a bong hit (Media help)
• Popular bong manufacturers: Roor, Hurricane, PHX, Illedelph, Ehle, Blue Dot, Gear

References

1. http://www.maps.org/mmj/vaporizer.html
2. Nicholas V. Cozzi, Ph.D. Effects of water filtration on marijuana smoke: a literature review
3. Nicholas V. Cozzi, Ph.D. Effects of water filtration on marijuana smoke: a literature review

External links and references

• Cannabis Culture thread on Bongs and Bong Culture
• NORML-MAPS Vaporizer Study, from the Newsletter of the Multidisciplinary Association for Psychedelic Studies; MAPS - Volume 6 Number 3 Summer 1996.
• Bongs, pipes and other wonderful contraptions, Erowid Psychoactive Substance vault, Bongs FAQ

• Drug paraphernalia
• Cannabis smoking