Backbone learned this design from instrument builder/inventor Ela Lamblin of http://LelaVision.com People have LOVED building and playing these at whatever event we've used them. Any action they'll support is guaranteed to be yet more epic.

Check out video on how they are made and there use in a demonstration. 

Materials needed:
PVC pipe (1 1/4" seems to be the right diameter for certain Gatorade bottles)
Gatorade or similar plastic bottle
Balloons
1/4" or similar flexible tubing
duct tape
hot glue is a bonus

Example of use: