i usually use a 1 litre
cause all i have to use as a bucket is the bottom of a 2 litre
then i just throw a glass bong bowl in the cap and prepare to be extremely baked
420purplehaze420 Reviewed by 420purplehaze420 on . Methods for a Gravity Bong What do you use to make yours? Some people will say go big with a milk gallon or something else but I know some people who use just water bottles. Personally I use a two liter clear gatorade bottle because I like to see that smoke get yellowish before I take off the cap :rasta: Rating: 5