20 OZ ROCKET

This is the most basic water bottle rocket there is. Very little is needed to construct it.  Even though it is only a small device, some of the better ones have soared up to 50 ft. All the rocket is is a small water bottle filled about 1/3 of the way with water.  Then a cork or rubber stopper is stuck into the mouth of the bottle. 

This needle attachment is put into the cork.  This attachment is commonly used for inflating basketballs, soccer balls, and so ons

 Finally the compressor is attached via a small hole in the cork.  Turn the compressor on and there you have it.