The water you’re putting in the bottle is what the smoke will filter through when you’re smoking the bong.
You can use any sharp tool to make the hole, like a pen, a knife, or a straightened out paperclip. Be careful that you don’t cut yourself or make the hole too big.
Make the hole about the same width as a pen. If it’s any smaller, you may have a hard time pushing the downstem through, and if it’s any larger, the downstem may be too loose.
If you already have a downstem, you can use that with your plastic bottle bong instead.
If you’re having trouble fitting the downstem through the hole, make the hole a little bigger and try again. Be careful not to make the hole too big or the downstem will be too loose.
If you have the cap to the bottle and you aren’t able to inhale all of the smoke, just put the cap on to trap the leftover smoke inside. Then, when you’re ready for more, take the cap off and breathe in the rest of the smoke.
Any kind of plastic bottle will work, but the larger the bottle you use, the bigger the gravity bong hits will be. You’ll need to fit the plastic bottle inside of another plastic container to make the gravity bong, so make sure it isn’t too big.
A few holes should be enough. You can always add more later if the smoke isn’t pulling through the bowl.
How much you cut off from the bottom doesn’t need to be precise. However, the more you cut off, the smaller the gravity bong hits will be.
Leave 1–2 inches (2. 5–5. 1 cm) at the top of the container so the water doesn’t overflow.
If you’re using a shallow container, the bottle may not be completely filled with water, which is OK. Just keep in mind that the gravity bong hits may be smaller.
Don’t push down on the bottle after you take the foil off or the smoke inside will escape. If you can’t inhale all of the smoke inside, cover the mouthpiece with your hand until you’re ready to take another hit.
