Tequila and specialty liquor bottles tend to have shapes that make them ideal for converting them into bongs. Look for especially unique bottles to use if you think you might put your bong on display, or if you plan to make a bong for someone as a gift.
Drill bits come in sets that include as few as 3 bits or as many as 15. A smaller set will of course be cheaper and should be all you’ll need for this project, provided that the set includes a 1/2" bit, as this will accommodate most bong stems.
Masking tape or painter’s tape may also fulfill this function.
Applying too much pressure while drilling can shatter the bottle. Go slow, and make sure you’re drilling smoothly and evenly. Electric drills are dangerous tools. Care should be taken when drilling to avoid injury.
Bong stems come in various diameters and lengths. You may have to do some checking to find the right fit for the bottle you’re using. If you’re unsure about the size, it might be smart to buy a couple different stems and see what works best. An average glass bong stem runs between $5 and $10, depending on where you look. If you do have to buy the bowl and stem separately, make sure the bowl is the appropriate size for the stem (the measurements should be displayed prominently on the package) and attach the two by sliding the bowl onto the thicker end of the stem.
If the hole you’ve drilled is too large, you can constrict it a little when you seal it by fitting it with a rubber ring, or by using a slightly wider stem.
Silicone sealant is flexible, non-toxic and forms a tight seal. A 2-ounce tube of liquid silicone sealant can be purchased for under $10 most places and is easy to apply. [5] X Research source
Glass dust is especially hazardous to breathe or ingest, and it only takes a few moments to clean your new bong. Don’t skip this step. [6] X Research source
