I think the greatest gravity bong I ever made was with a two liter bottle.

If you have a sneak a toker, one that is short snubbed and metal, it FITS perfect over the hole.
STDzRus Reviewed by STDzRus on . All I need is... A good gram of my homegrown outta the gravity bong and I'm set for the night :rasta: :rasta: :rasta: Toke it :cool: Rating: 5