What is a gravity bong and how do you make one?

A gravity bong, also known as a geeb, is a cannabis consumption method that uses two empty plastic bottles to funnel smoke through water and push it into the consumer’s lungs. Gravity bongs work by submerging a small bottle with a bowl of cannabis on top in a larger bottle or bucket of water. While lighting the cannabis, slowly draw the bottle out of the water to fill with smoke from the burning cannabis. Unscrew the lid, put your mouth over the bottle’s opening, and push the bottle down to let gravity propel the cannabis smoke into your lungs. Voila!

Do gravity bongs get you higher?

The short answer is yes. Gravity bongs force heavily concentrated smoke into your lungs, filling them to capacity beyond the average hit from a pipe or joint. When you inhale the contents of the smoky bottle into your lungs, you are essentially breathing in the smoke from an entire bowl of cannabis in one go. For this reason, gravity bongs are certainly not for the faint of heart. A tried-and-true method of old school cannabis consumers, it delivers a powerful hit of THC that may be too much for an inexperienced cannabis beginner.

However, if you’re looking for a bit of nostalgia and feel like getting crafty with your cannabis consumption, here’s a handy guide to creating your own gravity bong using a few everyday household objects. (Disclaimer: Inhaling combustible materials from a plastic smoking device may be hazardous to your health. Proceed at your own discretion!)

gravity bong


The first question one has to ask themselves is truly whether or not they want to make a gravity bong or purchase a silicone bong. There is not a single right or wrong answer to this question. For example, someone who is more handy than not should find no trouble gathering the materials and quickly putting together an airtight, fantastic gravity bong. On the other hand, someone less mechanically inclined might find it too much of a hassle or unreliable to want to do all of that. Homemade gravity bongs can certainly save a little money but, overall, the models in store are not pricey and are guaranteed to be airtight and 100% effective. Again, it will come down to personal skills and preferences as well as budgetary concerns. All in all, there is nothing wrong going either way so make sure to consider all of these factors.


There are two main varieties of gravity bong – particularly homemade ones. The first one, the bottle bong, is a different version of a waterfall bong (they both operate using gravity so the difference isn’t enormous) and simply involves treating the bottle a bit different. In a bottle bong, there is a plastic bottle that has been cut in half or at least had the bottom removed from it. This is so that when the bottle is placed into the bucket, the water will begin to fill the bottle up. The cap of the bottle either is or contains the bong bowl piece.

The bottle cap/bowl should not be on top of (or filled) when filling the bottle (this will cause a jet of air to shoot any herb in the bottle cap/bowl out of the bowl and everywhere else). Attach the bowl/cap and then light the herb inside while slowly pulling the bottle out of the water. This will cause the air to reverse and flow into the bottle causing the bottle to fill with smoke from the lit herb. Once the entire bowl has been consumed, simply remove the top and shove the bottle back down into the water while inhaling the smoke coming out.

A waterfall bong on the other hand simply does the same mechanical function but with one bottle and no need for a bucket of water to keep the bottle in. Rather than cutting off the entire bottom segment, simply make a large enough hole to drain water somewhat quickly but small enough that covering it is a simple task for a single finger. Fill the bottle with water while covering the hole. Then, place the bowl on top and pack it. Finally, light the bowl and allow the water to flow out from the water bottle, like a waterfall, and into a bucket, sink, or on the ground. Similarly, the gravitational pull of the water leaving the bottle will fill the bottle with smoke that can be quickly, easily inhaled once the bowl is cashed. These are the two main types of gravity bong.


Gravity bongs are much safer to use than dab rigs (no need for a blowtorch) but wax often is stronger than herb (no matter how good the quality). This comes down to personal preference on the power and convenience factors. Either is an excellent option.


Ultimately, this comes down to personal preference. There is absolutely no reason to avoid a gravity bong unless someone is SUPER clumsy or simply dislikes bongs. The fact that they can be homemade is even better because the cost of trying one out isn’t nearly as bad as other pieces.


Perhaps, unsurprisingly, marijuana smokers are the primary users of the term. Based on social-media usage, the term seems to have particular currency among young and college-aged adults, especially males. Because the device is inexpensively assembled, the gravity bong is often associated with teenage potheads who can’t afford nicer bongs.

Among marijuana smokers, the gravity bong has a positive reputation for being cheap but creative and effective. It is sometimes referenced in speech and in writing as way to explain why someone is extremely high.

The gravity bong also goes by the slang terms G-B or geeb. And, sometimes the term waterfall bong is used, but even though it uses similar physics as the gravity bong, it is slightly different as it only has one container instead of two.


gravity bong


  • Box cutter or scissors
  • Two different-sized plastic bottles
  • Aluminium foil
gravity bong



If your makeshift gravity bong has a bucket style, the bottom of the smaller bottle needs to be cut off. The larger this top chamber is, the more smoke it can hold.


Cut the larger bottle in a way, so that all you’re left with is a plastic “bucket”. Now, fill this bucket with water so that the smaller bottle will be mostly submerged, but not to the point that the water level in the small bottle reaches over the last say 4cm.


Next, take some aluminium foil and form it to a small bowl. The problem here is, that the burning weed has to be ABOVE the plastic—serious, you don’t want to enhale any degassings of it! You may have to try twice or thrice, but trust us, the effort is well invested. Poke around three or four small holes in the bottom of your foil bowl (without ripping it) to allow for sufficient airflow. Trim off any excess foil if necessary. Remember: In order to take that toke you will have to remove the bowl later on, so make it seal off as good as possible but also easy to remove.


This step requires some care and caution. Submerge the smaller water bottle in the larger bucket bottle, leaving the topmost region of the smaller bottle safely above water.


Load your bowl with your desired amount of cannabis and secure it on the upper orifice of the small bottle.


Now it’s time to light the cannabis. While holding a flame to your cannabis, slowly pull the small bottle upwards and watch it fill with smoke. Once the bottle is filled to maximum capacity, very carefully remove your bowl, and put your mouth securely over the opening. Slowly push the smaller bottle back into the water. As the water floods back into the bottle, the smoke will be pushed deep into your lungs.

And there you have it!

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