Stretched Bottle
The U15 Stretched Pop Bottle with Bumper is a definite must-have for water rocket / pop bottle rocket scientists. Besides the appeal of its long, narrow rocket-like shape, the reduced cross-sectional area and correspondingly minimized air friction, there is the curious aspect of how a bottle can have its shape so radically altered from a stubby standard pop bottle to this. It will definitely make your rockets stand out in any crowd.
