You have various methods, the most simple one requires you of having an empty bottle, a tube and the head of a metal pipe. Burn two holes in the bottle, one to insert the tube in and one like a regular bong where you're supposed to put your thumb on. Insert the tube into the lower hole, put the head on and make it somewhat airtight
With your hands,your brain and with what's laying around. Metal trash can and leafblower work for me.
Try searching first off. But the easiest thing to do is apple pipe, or waterfall or steamroller with a small socket (from a ratchet set) and gatorade bottle.
Don't smoke out of plastic. You'll inhale toxic fumes and die of asphyxiation. Sent from my iPhone using Grasscity Forum
Gravity/waterfalls seam fun. I've never used them but they supposedly fuck you up and seem easy to make. It's not peer pressure, it's just your turn.