I tried one of these today - it was pretty sweet.

I bought a 2litre soda bottle, drank it, filled it up with water. I found a good spot, turned the bottle upside down so there was air where I was going to poke the hole. I poked a hole with a pen, about the width of a staples brand pen. Had a friend hold a finger over it, took off the cap, put a small square of tin foil in top, pressed it in a little and poked holes with a safety pin. Filled up the bowl, really full, lit my lighter and told my friend to let go of the hole. The weed was truly blazing, and the bottle filled up with thick white smoke. It looked truly awesome. Taking hits off of it was weird though, the smoke was not warm at all, you could barely even feel it. But we were baked, it was sweet.

I highly reccomend a 2 liter water fall, the only part that sucks is that you need a place to let water fall out and you need to refill it every time.
pu ekot Reviewed by pu ekot on . 2 liter gravity bong take a two liter and poke a hole at the bottom, put tinfoil and weed in the cap part, after youve filled the 2 liter with water and have you finger over the hole. Light the bowl and remoe your finger and the bottle fills up. is that easier than a regular gravity bong? Rating: 5