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How To Make a Gravity Bong

by Hemper Co 5 min read

DIY Gravity Bong

DIY Gravity Bong Step by Step

If you’ve landed on this webpage you no doubt enjoy cannabis. Whether a casual user or a seasoned professional, there are countless ways to explore and consume your favorite sticky green.

But when it comes to finding the perfect way to light up, sometimes you find yourself without all the supplies you need to get the job done right. As cannabis users, we’re a creative and innovative bunch, capable of fashioning our own bongs and smoking apparatus at home or on the go. Consider the classic fashioning of a bong from an apple as a testament to our ingenuity when in a pinch. 

Whether due to necessity or simply as a fun DIY project, one type of bong that you can make yourself is a gravity bong. This guide from Hemper Co will walk you through step by step how to make a gravity bong from scratch.

Sit back, light up, and maybe even take some notes. By the time you get done with this guide you’ll have everything you need to make your own bong or you may just want to shop our high quality Bongs. We'll let you decide!

Let’s get started….

What is a Gravity Bong?

Before you decide if you want to fashion your own gravity bong, it is best to first understand what a gravity bong is and how it works in the first place. It sounds like a pretty basic first step, but hey, you wouldn’t be the first one to think the name was cool and just jump into the project blindly.

A gravity bong is unique in that it works to send the smoke through water and then push that smoke into your lungs with gravity being the driving force leveraged to send the smoke out of the bong, up the tube and into your lungs where all that fun stuff like THC can get absorbed and work its magic.

Gravity bongs are known for their ability to help you experience a “higher” more intense high than as with other types of bongs. This is because the smoke that is forced into your lungs is heavily concentrated. The use of gravity also sends a greater volume of smoke into your lungs than a pull from a regular bong can. As such, bong beginners are advised to take it easy when using a gravity bong for the first time. Being high is fun, being too high usually isn’t a good time.

1. Building a Bucket Gravity Bong

The bucket bong is made using two-liter plastic bottles. Before you get started, gather the items listed below. 

You will need the following items:

  • A two-liter soda bottle that has been washed out and allowed to dry; keep the cap!
  • A bucket
  • A bud bowl
  • A drill
  • A sharp knife or boxcutter
  • Some water
  • Aluminum foil
  • Your cannabis
  • A lighter

Once you have collected all your materials, you’re ready to begin construction! Simply follow the instructions below and you’ll be on your way to lighting up with your very own bucket gravity bong before you know it.


  1. Take your bucket and fill it with water, leaving about an inch of space at the top.
  2. Drill a hole in the cap of the bottle. This is where the stem of your bowl will go, so try to make it a precise size for your stem to achieve an airtight seal.
  3. Wrap the cap in aluminum foil, shaping the foil into a bowl. Poke it with something sharp three to five times for good ventilation.
  4. Insert the stem into the cap. Do not be afraid to force it through, as that will help seal the hole, but if you are having too much trouble, you can use coconut oil or olive oil to help it through.
  5. For now, set the bowl and cap aside, turning your attention to the two-liter bottle. Cut the bottom off right at the point where it begins to curve towards the center of the bottle, taking care to be as straight as possible.
  6. Pack your bowl, and you are ready to use your new gravity bong!

Using a Bucket Gravity Bong

Stick the bowl and cap combination back onto the two-liter bottle and lower the bottle into the water in the bucket. After you light your consumable, slowly pull the bottle up out of the water without completely removing it.

Helpful tips:

  • Keep the bottom of the bottle in the water, or you will lose all your smoke.
  • Watch the smoke in the bottle; it should pull up to the chamber in the stem.
  • Make sure you have both hands free once the bottle is almost out or your consumable has almost burned up, whichever happens first.
  • Do the next step quickly.
  • Check out the video below for even more tips

Gravity Bong

Once you are ready, remove the cap from the bottle and put your mouth over the opening in the bottle. Push the bottle back into the water as your mouth is over the opening of the bottle, allowing the smoke to be forced out of the bottle and into your mouth.

You can inhale as it descends, or you can choose to let the smoke rest in your mouth, inhaling at the end. You may also get a little water in your mouth with this method, so proceed carefully.

2. Making a Waterfall Gravity Bong

While a waterfall gravity bong is similar to a bucket gravity bong, there are some differences.

Here is the waterfall gravity bong shopping list:

  • An empty and dried-out two-liter bottle with its cap
  • A drill
  • A bucket
  • Some water
  • A bud bowl
  • Aluminum foil
  • Your cannabis
  • A lighter
  • An optional extra soda cap

The assembly instructions also differ a bit from bucket gravity bongs.

  1. Drill a hole in the bottom of the bottle as much in the center as possible but keep it small enough to cover with the tip of your finger. It needs to be big enough, however, for the smoke to get through.
  2. Like the bucket bong, you want to drill a hole in the cap of the bottle small enough to be airtight but big enough to fit your stem.
  3. Pack your cap, remembering to craft your aluminum foil bowl, and set it aside.

To use the waterfall bong:

  1. Plug up the bottom hole of the bottle with your finger and fill the bottle with water, very close to the top of the bottle.
  2. Put the cap on the bottle and hold it over your bucket.
  3. Carefully light your consumable and remove your finger from the hole in the bottom of the bottle, allowing the water to spill out.
  4. As the waterfall removes the water from the bottle, the smoke rises. As soon as all the water has left, cover the bottom hole again to trap the smoke.
  5. Place your mouth over the top opening, release the bottom hole, and inhale.

And now you know how to craft two different do-it-yourself gravity bongs for any occasion! Be sure to check out How To Make a Bong At Home for more tips.

Always Be Ready on the Go

Most of these tools, or something comparable, are available no matter where you go. With this knowledge, you can be prepared to craft a homemade gravity bong at any gathering, party, or camping trip that you need to. Always practice safety first when creating your gravity bong. If you rather not go through the hassle, then find something from our bongs on sale.

Understanding how a gravity bong functions is key to using it properly. Always smoke responsibly and be careful of sharp tools and hot components!