From the MAKE Flickr pool
Another thing I wish I had when I was a kid. CMorris writes:
This water mortar is made from PVC using a variation on Kaden’s drill press lathe technique from “Eccentric Cubicle.” The finished product launches over a quart of water per shot!
Just make sure you soak your enemy with that first shot. Refill times will leave you very vulnerable. –Link
From The Maker Store:
Eccentric Cubicle @ the Maker store – Link