Here's my pessimistic input:
(Wikipedia)
When all the water has run out the user removes the bottle cap, places their mouth over the opening at the top of the bottle, and inhales the contents. The smoke isn't cooled at all making this bong not one for people who like to savour their weed.
beachguy in thongs Reviewed by beachguy in thongs on . gravity bong = maximum stone damn. ive been smokin for awhile, like 15 years and ive had my share of trips but a gravity bong with a 3 liter soda bottle and some shitty weed had me stuck.i got home last night and i was gonna smoke a boel of some kron when i found an old bag of stress. i took out the seeds and it looked horrible.i cut the bottom off the soda bottle and burned a tiny hole in the cap and put a bowl from my pipe in the cap.i put the soda bottle in the water and then put the cap back on.light the lighter and Rating: 5