Fucking impressive gravo man. My roommate and I recently made one of of those 2-liter (I think) gatorade bottles that have indent in the middle then go back out to the original diameter...That's the best I can explain it. And like King Elmo, I use a 6mm socket for the bowl.

For some reason the shape of the gatorade bottle creates a great amount of pressure, and produces some RIIIIIIIIIIPSSSSSSSS.