How to make a gravity bong

Gravity bongs were a staple feature in many vintage stoners’ parties due to their ability to elevate one’s high to new heights. Of course, nowadays we have all sorts of highly concentrated marijuana strains that don’t really need extra help to get you that next-level high.

However, you can always hit a gravity bond for old times’ sake and we’re going to show you how to make one.

What’s a Gravity Bong?

There are basically two different types of gravity bongs; a bucket bong and a waterfall bong.

A bucket bong is usually made from the bottom part of a 2-liter plastic bottle, combined with the top part of a 1-liter smaller bottle. The point here is to make the top smaller than the bottom.

Next, you have to fill the bottom half of the bong with water while the top part is where the mouthpiece and the bowl will be. Ideally, you want to create a high-pressure situation where the top half is shoved into the bottom half of the bong. Then, as you pull from the lighted bong, a vacuum will be created from the smoke created by your lighter.

By the way, it’s much easier to pull from a bucket bong than a waterfall bong due to the pressure created by the two halves.

To make a waterfall gravity bong, you’ll need a large plastic bottle. Similar to the bucket bong, the top section of the waterfall bong will be made out of the bowl and the mouthpiece, while the bottom half will be a normal bottle with a bottom hole.

The weed comes in through the cap, and when you take your finger out of the hole, gravity will take care of the rest. The result will be a dance between the water and the smoke which will look like a waterfall effect, but really what’s happening is that gravity is pulling the water out of the bong for you so that you won’t have to strain your lungs.

How to Make a Cannabis Bong

To make a bucket bong, you’ll need the following:

  • A pair of scissors
  • A small plastic bottle
  • A large plastic bottle
  • Aluminum foil

With your scissors, cut out the very bottom of the small bottle and the top half of the large bottle.   Cut out a hole in the bottle cap and create a bowl using the aluminum foil while making sure you poke holes in it afterward to help get the smoke into the bottle.

How to Smoke a Bucket Bong

Pour water into the large bottom half of the bong without letting it overflow, take the bottle cap off and put some ground up weed into the bowl. Place the small top half of the bong into the water and light it up while making sure to slightly tug at the top half of the bong as you pull it out of the water.

How to make a Waterfall Bong

To make a waterfall bong, you’ll need the following materials:

  • A pair of scissors
  • A large plastic bottle
  • Aluminum foil

Using your scissors, cut out a hole from the bottle cap and make a bowl using the aluminum foil. Again, be sure to poke holes into the bowl so that it’s easier for the smoke to get into the bottle.

Last but not least, cut out a hole the size of your finger beneath the bottle and you’ve got yourself a waterfall bong!

Gravity Bong Instructions

Want to know how to make a gravity bong? Great. All you need is some weed, boredom, a 2 liter bottle and another bottle or container that’s larger—your kitchen sink or bucket will do.

make gravity bong1. Cut the bottom off a two-litter bottle. The bigger the bottle the bigger the capacity it’ll have to contain smoke, so look for a 2 or 3-liter bottle. If you want to learn how to make a gravity bong out of a Gatorade bottle or whatever, these instructions also work.

2. Punch a hole in the lid. Use a 3/8 bit and drill a hole right in the middle of the lid. Or use a lighter to heat the plastic lid until if softens, then push a metal or glass tube through it—forming an airtight seal.

3. Make the bowl. The easiest way to do this is to use a bowl from another pipe or bong. You could also use aluminum foil or an aluminum can, but there will probably be some unhealthy off-gassing.

how to make a gravity bong_bowlMake a Gravity Bong Bowl—Aluminum foil method

Tear of a small square of aluminum foil and lay it flat across the top of the bottle cap.

Push it down in the middle with your finger so that it forms an indentation in the hole that you just made.

Scrunch the aluminum foil around the edges of the bottle cap like it’s pie dough so that it stays on tightly.

Use a pin or needle to poke small holes in the area of the foil that goes into the hole. Make them small enough so your weed won’t fall through.

Make a Gravity Bong Bowl—Aluminum can method

Carefully cut a rectangle from an aluminum can. Bend this rectangle into a funnel shape. You want the top of the funnel to be large enough to put your weed in without it falling through the bottom.

Slide the funnel into the hole you made in the bottle cap. The bottle cap should more or less bisect the funnel, so that the top of the bowl sticks out but the bottom will go down into the bottle when you replace the cap.

Use hot glue or superglue to glue the funnel to the bottle cap and make sure that the hole has an airtight seal.

how to make a gravity bong4. Get a bucket. You will want one large enough to fully submerge the container. Full gallon jugs work well. Fill it with water. Place the container into the water with the cap removed. The top of the container should rest an inch or two above the surface of the water. Screw on your lid and then pack the bowl—Be sure to put the container into the water first, before screwing on your lid, or it’ll blow your herb right out of the bowl.

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And that’s how to make a gravity bong—you’re welcome. Wanna learn how to use a gravity bong? Well since you took the trouble of making one, it’s the least we can do.

use a gravity bongHow to use a gravity bong

how to make a gravity bong_light it1. Light the marijuana. As you are lighting, slowly draw the bottle out of the water. The bottle will fill with smoke. Once the container is nearly full and before the bottom comes out of the water, prepare yourself by exhaling.

how to make a gravity bong_lift it2. Take a hit. Twist off the cap and place your mouth on top of the container and, without inhaling, push the bottle down til it reaches the bottom of the bucket. This will force the smoke into your mouth without you even inhaling. When the bottle reaches the bottom, inhale the rest and take your mouth off just before the water rises close to your mouth.

PRO TIP: If you inhale while pushing the bottle down, you might not be able to clear the whole thing. And that’s how to use a gravity bong, dude.

Pic: Wikihow

The Basics of How to Make a Homemade Bong

If you’re already an expert maker of makeshift bongs, you may want to skip down to our list of Top 25 Homemade Bongs.

Otherwise, here’s the basic breakdown of how to make a bong.

You’ll need materials to make the following pieces of the homemade bong:

  • Chamber
  • Downstem
  • Bowl
  • Mouthpiece (sometimes)

Each piece of the DIY bong is best constructed of certain materials while other materials should be completely avoided. It’s likely that you’ll need a handful or more of things lying around the house, not just one or two.

Let’s take a more detailed look:

This is the main part of the makeshift bong, and there are many different things you can use to construct it, especially the following:

  • Plastic bottle
  • Aluminum can
  • Apple
  • Pumpkin
  • Cucumber
  • Carrot
  • Any type of canister, carton, or tube-like object

Make a hole near the bottom of the chamber you’ve chosen from above. Ideally, it should be around 2 inches (5cm) away. The hole itself should be between 1/8 inch (3mm) and ¼ inch (6mm) in diameter.

The hole is where the smoke will enter the chamber from the bowl and stem. So, it needs to be sealed tightly with sealant or tape. The tighter the hole is around the stem, the better, so this will be the first real test of your skills!

Whichever material you use, place it in the hole from above that you’ve just created. Common materials include:

  • Small metal pipe
  • Pen tube (that you might have hollow out yourself
  • A true stem

Regardless of your choice, insert it in at a positive angle so that you won’t wet your weed and ruin the sesh.

To get the effect you want from your homemade bong, this is crucial. Smoke will exit the bong in the wrong place and ruin the effect if the hole for the tube isn’t sealed tightly enough. If your sealant isn’t effective, or you don’t have any, use gum or tape or even glue.

So, how do you know if it’s sufficiently airtight? Put it to the test: put your hand near or over the seal and blow through the mouthpiece. Do you feel air? If yes, it’s not tight. You may need to attach a rubber grommet to seal it better.

At the end/top of the tube, add the bowl. If you have an extra glass bowl, that will definitely work.

If not, a homemade bowl will be necessary. Attach rolling papers or even tin foil, though we don’t recommend it because of the toxic fumes that are given off. So choose a safe material for your bowl before inhaling.

Fill your makeshift bong chamber with water until the tube is underwater by at least an inch. It’s a delicate balance, though, as too much water suffocates the weed. Also, if you fill it up more than one inch, it reduces the amount of smoke in the chamber when you inhale.

Either way, you don’t get the effects you’re looking for.

This is also called the clearing hole, and it should be bored with a pen or paper clip about halfway (or slightly lower) down the chamber of your homemade bong. However, don’t make it too low or water will spill out whenever you take a hit.

This hole prevents too much smoke in the chamber, as, without the carb, there’s not enough oxygen for the toke to be effective. However, if it’s too high, too much oxygen gets in and dilutes the effects you’re looking for.

The best part of homemade bong construction: the toke test.

So, load up your favorite strain in the bowl, cover the carb with your finger – and let ‘er rip!

Need more be said? Uncover the carb during your long, hard toke – and then exhale

Concerns and Worries

Tokers are known for their sense of adventure and carefree spirit, but if you’re a medical patient or if you’re concerned about the welfare of your smoke buddies, nearby pets, and more – heed some of the following cautions:

  • A plastic straw is not a good replacement for a pipe – it’s too weak and the plastic gives off harmful fumes
  • Aluminum foil is not a good idea for a bowl – as with plastic, aluminum gives off harmful vapors when being burned – it’s known to hurt your throat and damage lungs and sometimes worse
  • Avoid fruits that are juicy or mushy, except in a dire pinch.
    • Oranges and kiwis may be too juicy to get the proper toking efficiency
    • Bananas are too mushy in consistency and don’t always react well to flame
  • Avoid tape and similar types of adhesives when possible because of the harmful vapors they can put out when heated

If You Seem to Find Yourself

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Frequently Making DIY Bongs,

Here Are Some Basics

To Keep around the House

To prevent stress from a bong mishap, especially if you it seems to happen frequently during your seshes, why not keep a few basics around the house? You’ll always be prepared and be ready for anything.

For example, once you finish a ballpoint pen (or it gets low on ink), keep it around. This will ensure you always have enough tube materials lying around. You can even share with your BFFs.

Aluminum foil, despite the risks, is handy for connecting pieces of the homemade device. However, as we mentioned above, do your best not to use foil as a bowl.

Toothpicks are great for constructing a screen, especially on a fruit bong.

Seasonal fruit – watermelons, cantaloupes, and melons in the summer and pumpkin or large Asian pears in fall and winter – are always good to carry in the fridge, just in case. Year-round staples include carrots, bell peppers, and apples – keep all three handy for makeshift bongs in addition to their health benefits.

While recycling is the best thing for plastic bottles, it’s hard to beat a different version recycling plastic bottles and going “green”: save the bottles for those “no-bong” emergencies.

Even if you don’t have this type of sweet tooth, keeping some sticky, chewy candy such as gum or soft sour candies is strongly suggested. In addition to being chewed while you concentrate on constructing your marijuana masterpiece, a piece of gum or Starburst is also an excellent adhesive for a makeshift bong.

Finally, peanut butter is also great as a sealant.

Now, let’s take a look at some homemade bongs that will have you shaking your head in either wonder or concern.

Why Bongs? / The Bong Concept

Making a bong is very simple, because the concept of a bong is simple. When you toke, you are bubbling the smoke through water before inhaling it. This text guide will take you through various aspects of bongs and bong-making. I hope you will find it valuable and I hope it inspires you to make your own bongs. The reason for using a bong is mostly for health reasons, though people love using bongs for many more reasons. The active part of marijuana, THC, is not water-soluble, so you will not lose any of your high by hitting a bong instead of a joint or pipe. The water does filter out many of the impurities(the resinous tar), thus saving your lungs from inhaling crud. Very hot water will remove the most impurities, and very cold water will cool the smoke for a smoother hit.

The anatomy of a conventional bong is very simple. It consists of a bowl (with a screen), a stem, a chamber, some liquid, and an opening for the mouth.


The crude diagrams above show a generic bong. All you need for a simple bong is a plastic pop bottle (12-ounce or larger recommended), some kind of stem (a metal tube, plastic tubing, or whatever), and a bowl (use aluminium foil if you can’t find anything else…but this is the least healthy option). A tube of silicone works well – it’s the best sealant for plastic, and satisfactory for metal-plastic seals.

After you have constructed the bong and let the sealant cure, don’t forget to drill(knife) a 1/4″ hole for the carb. Water fills the container and stem just up to the carb. The water level should really be at least an inch below the carb so that when the bong is tilted the water won’t leak. The job of the carb is to regulate where the air will be supplied from. If covered, the air(smoke) will come from the burning weed; if uncovered, air will be pulled in through the carb to force out the standing smoke from the chamber.

The Water Test

Do a “water test” before you pack a bowl. Pull a lungful through the bong with the carb covered. If you get a biting, chemical flavour, then you have not let the silicone cure long enough – it’s toxic to inhale until it’s fully cured; then it’s harmless. The water test will also let you determine how airtight your bong feels.

Smoking a conventional bong means that you have water in your bong, you have a packed bowl, and a lighter. Cover the carb with your thumb and light the bowl and pull air through the bong until you get a steady bubbling of smokethrough the water. When your lungs start to hurt a little, let go of the carb and gently pull in the trapped smoke. If your lungs feel fine as you inhale, then save a little lung space for the trapped smoke – let go of the carb and pull it in! Not all bongs work with this method, however. Gravity bongs work on a different concept, which will be explained later.

Bongs vs. Joints & Pipes

Not everyone uses bongs. New smokers may wonder why anyone bothers with bongs, and plenty of stoners prefer joints to pipes or bongs.

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Those who favour joints will wax romantic about the joys of rolling, of passing around a fatty, and of super-potent roaches.

Some smokers disdain joints mainly because of their wastefulness. Consider that while the joint is being passed around or stalled, it is still burning, losing precious smoke. If you grow your own buds you can afford to be carefree, but for many smokers that is a luxury. Most stoners must pay astronomical “street” prices for their greens.

Bongs have a special advantage. A stoner can control the burning by using the flat side of a lighter to extinguish the bowl after taking a hit. The practice of extinguishing the bowl can save a lot of pot in the long run.

Even those who don’t habitually extinguish the bowl will still save more buds, considering the size of a bowl compared with a joint. A bowl holds a smaller amount of bud, so the most you can waste is the quantity a bowl will hold. Stalling a joint, though, will use up a much larger portion, depending on the size of the joint.

Joints are also much harsher on your lungs. While some joint-rollers will use pre-made filters, or a makeshift filter made from a rolled-up paper, nothing compares with the filtration effect of water. Ed Rosenthal of High Times hasnoted that water not only cools the smoke, but actually removes harmful impurities as well. Bongs have this advantage over pipes, which, like joints, pass the unfiltered smoke right into your lungs.

As far as portability goes, bongs can be made in a variety of sizes. Most growers make a makeshift portable bong out of a 12-ounce plastic water bottle. It works fine, though the filtration leaves something to be desired.

Getting Started: Find The Right Bottle

cut bottom of bottle for gravity bong

When it comes to how to make a gravity bong, one thing is key. Finding the right bottle. The bottle is most important because it’s both where the bowl you’ll be smoking and your mouth will be going. You’ll want it to be small enough for you to get your lips over, but not so small that it restricts airflow. You want to find something like a large water bottle or a two-liter soda bottle. You’ll also have to find a slightly bigger container to hold the water. It should be slightly shorter than the bottle so you don’t end up with water in your mouth when you hit it. Nothing worse than an unexpected mouthful of water. Or anything else, for that matter.

Fill Up Your Homemade Gravity Bong

a glass being filled with water

Now that you’ve got yourself a bottle and a water container, it’s time to get the bottle ready to dunk.  What you want to do is poke a hole in the bottle with a sharp knife, near the bottom. Then, use a pair of scissors to cut the bottom of the bottle off, leaving a flat, open hole. Get rid of the cap. It’s thick plastic and you don’t want to risk heating that up while you’re inhaling something. Now it’s time to fill up your bucket/bathtub/salad bowl/whatever you decided would be your water container. Place the bottle in the container with the water and make sure there is some room for air at the top. So, you know how to make a gravity bong. Now it’s time to make a bowl!

Make A Bowl For Your Gravity Bong

scissors silicone wax container glass chillum

Here is where gravity bongs vary from individual to individual. The way I learned to make a bowl for a gravity bong was to just shove some aluminum foil in the mouthpiece of the bottle. Poke a few holes in it, fill it with herb and call it a day. Now that I’m a little older I’ve realized that maybe smoking off of aluminum foil isn’t such a great idea. I’m not telling anyone how to live their life. You have to work with what you got. However, for the sake of my health, the bowl for this homemade gravity bong was made from a heat-resistant silicone wax container and a mini glass chillum a friend of mine gave me. Super simple setup, and once you know how to make a gravity bong, the bowl is a sinch.

Attach The Bowl & Light It Up

homemade gravity bong

Whichever bowl style you decided to go with for your homemade gravity bong, it’s now time to attach it to your bottle setup. It’s important that you use something that is fairly simple to remove quickly because you’ll need to be able to remove the bowl to take the hit. Also, an important thing to remember is to always put the bottle in the water BEFORE you attach and fill your bowl. You’ll want water inside the bottle before you put the bowl on so that the bowl makes a seal, otherwise, the whole “gravity” part won’t work and you’ll look totally lame, bro. Now light it up, let’s make some clouds!

Using Your New Homemade Gravity Bong

sacramento dabber using a homemade gravity bong

Using a gravity bong can be a tricky thing to learn at first. The key is to light the bowl and slowly lift the bottle at the same time. When you lift the bottle, the water tries to escape through the bottom. The bowl makes a seal, so the water dropping pulls air through the bowl. Add a little bit of fire to that equation and you’ve got yourself a genuine homemade gravity bong, my friend! Always remember to pull up slowly. Pulling up too quickly can thin out your hit. What you want to see is thick, milky, almost yellow clouds of smoke pouring into your piece. These things are made for huge hits, after all.

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