What is a Gravity Bong?

A gravity bong is a type of homemade bong that uses water and pressure to draw smoke into the lungs. It consists of a two-piece chamber system that nestles together—one larger chamber to hold the water and a second smaller chamber to hold the bowl and capture the smoke. As the herb or tobacco is lit, gravity pulls smoke into the bottle using water in a container to create suction. A gravity bong is also known by various names such as GB, geeb, bucket bong, or waterfall bong.

How Does a Gravity Bong Work?

A gravity bong works by creating a vacuum between two chambers with water as a sealant in the middle. First, a larger receptacle (typically a plastic bottle with the top cut off) is filled with water with its open end pointing upwards, and a smaller container (usually a smaller plastic bottle with the bottom cut off and an opening for the cap at the top) is then submerged in the larger bottle. A bowl with a small opening at the bottom is attached to the smaller bottle where the cap would be, filled with herb or tobacco and lit. As you pull the top chamber out of the water, it creates negative air pressure between the two chambers that pulls air through the bowl, filling the space with smoke. Gravity is what keeps the water in place at the bottom for you to pull against to create the vacuum.

Once the vacuum is filled with smoke, the bowl is removed, and you can inhale the hit. Normal inhalation will pull the smoke out at a comfortable pace (and draw water up), but if you push down, the smoke will be forced out, assisting the hit. Be aware: because there is no air inside the vacuum to mix with, the resulting smoke is highly concentrated, and will deliver a powerful hit, which can often be intense for newer smokers, or those with a lower tolerance.

Why Use a Gravity Bong?

There are many benefits to using a gravity bong. It’s among the most cost-effective and easy ways to get yourself elevated without using a traditional glass piece, blunt, or joint. A gravity bong can also help you conserve your herb or tobacco, as you only need a small amount to fill the bowl and get a big hit. A gravity bong can also produce more flavorful and potent smoke than other methods, as it preserves more of the terpenes and cannabinoids that are otherwise lost in combustion.

How to Make a Gravity Bong?

Making a gravity bong is a fun, easy DIY project that requires only a few household items. Here’s what you’ll need:

  • A large plastic bottle (such as a 2-liter soda bottle) for the base
  • A smaller plastic bottle (such as a 16-ounce water bottle) for the top
  • A metal socket or bowl piece that fits snugly into the cap of the smaller bottle
  • A drill or scissors to make holes in the bottles
  • Water
  • Your favorite herb or tobacco

Here’s how to make your own gravity bong:

  1. Cut off the bottom of the smaller bottle and drill or poke a hole in its cap.
  2. Insert the metal socket or bowl piece into the hole in the cap and screw it back on.
  3. Cut off the top of the larger bottle and fill it with water.
  4. Submerge the smaller bottle in the larger one, leaving some space at the top.
  5. Pack your herb or tobacco into the bowl piece and light it.
  6. Slowly pull up on the smaller bottle until it’s almost out of the water, but not completely.
  7. Unscrew the cap and put your mouth over the opening of the smaller bottle.
  8. Push down on the smaller bottle while inhaling to get your hit.

Tips and Tricks for Using a Gravity Bong

Here are some tips and tricks to make your gravity bong experience more enjoyable:

  • Use fresh water every time you use your gravity bong, as stale water can harbor bacteria and mold.
  • Clean your gravity bong regularly with rubbing alcohol and salt to remove any residue and odor.
  • Replace your plastic bottles every once in a while, as they can degrade over time and release harmful chemicals when heated.
  • If you want to make your gravity bong more durable and stylish, you can use glass bottles instead of plastic ones, or buy a ready-made gravity bong from a reputable company.
  • If you want to make your gravity bong more efficient and smooth, you can add ice cubes, lemon juice, or mint leaves to the water to cool and flavor the smoke.
  • If you want to make your gravity bong more fun and creative, you can decorate your bottles with stickers, paint, or glitter, or use different shapes and sizes of bottles to create different effects.


A gravity bong is a simple but effective way to enjoy your herb or tobacco. It can deliver a strong and satisfying hit that can get you high in no time. It can also help you save money and material, as you only need a small amount of herb or tobacco to get a big hit