So, given my last few posts which detail tried and true methods of getting away with smoking weed at home and college, I feel obligated to elaborate on the topic of making a waterfall gravity bong.

I should note, the following specifications merely constitute my preferred style of waterfall gravity bong. You can extrapolate the physics of waterfall gravity bongs into virtually any manifestation. As long as its a closed container with two holes situated such that the suction created by its release of water draws weed smoke in, it’s pretty much a waterfall gravity bong.

Without further textual dwelling, I present:

How to Make a Waterfall Gravity Bong

Step One

First things first, obtain a 20 ounce or 1 liter plastic bottle of some sort. I went with the all-American choice.

However, I chose Coca-Cola because that was all I had on hand at the time. Recently the Coca-Cola company redesigned their plastic bottles, which is only an issue because the new bottle caps are harder to work with when making any sort of gravity bong. So if you do go with a Coca-Cola product, you might want to rummage through your garbage to find a better bottle cap; they’re still compatible with the new bottle design.

Step Two

Now that you’ve got your bottle, take an open flame to the bottom of it, directly over one of the five notches, until a small hole begins to form. The hole does not need to be that big, but if it’s too small you won’t get sufficient enough airflow to pull a hit, but we’ll worry about that later. If the hole is too big, or even almost too big, to be easily covered by your index finger, get a new bottle.

Step Three

Now you’re done with the bottle, put it aside. This part is a little harder to do, especially your first time. You’ll probably want to make sure you have more than one plastic bottle cap handy in case you fuck up.

Take the bottle cap and place it facing up on a table, and use a knife or scissors, or anything that works for you, to poke a small hole in the center of it. A small switchblade-sized knife is best because, generally, when you stab it through the top until it hits the desk, the slit it makes is the perfect diameter of the hole you want. Once you’ve stabbed through the top of the cap, slowly and deliberately twist the knife so that it carves out a perfect circle. Keep in mind that the picture above is of a grav top that has already been made, and you’ll want the size of the hole to be about half the size of the one pictured.

The next step is the most difficult.

Step Four

Once you have your small hole, apply an open flame to/through it until the plastic gets melty enough to shove this little socket wrench piece into:

Such that this becomes the final product:

And of course the beautiful final product:

From this point, you plug the hole at the bottom with your index finger in such a way that allows you to hold the bottle upright with only one hand. Fill it up with water and twist the cap on, make sure it’s airtight.

As you release your finger from the hole, apply an open flame to the socket wrench piece and watch the smoke poor into the bottle until it replaces the water. Put your index finger back over the hole to avoid letting the smoke escape, unscrew the cap and enjoy.