Picture of The Ol' Squirter: A Rather Large Water Gun
(Somehow this took longer to write than it did to make. This may have something to do with the fact that I have to share this computer, but I don't have to share my tools.)

It all started innocently enough. I was in a production of a Midsummer Night's Dream, and it was decided that for this production the cast party would be a water fight. Mind you, the only other thing I had that counted as a water gun was a small spray bottle that leaked a lot and had a range of about 7'. So my words on the occasion were, "If I bring a water gun, I will build if myself."

And wouldn't you know it, I did.

This is a powerful water gun, make that cannon, capable of delivering over a quart of water 25' or more, and due to its dangling hose design your reservoir can be as large as you want (I use a 5-gallon bucket). However, that same feature makes it cumbersome to carry around while in use; I just intended it for it to be stationary. All the parts are available for about $60 from Home Depot, and probably from Lowe's, although some parts were only available through the Home Depot website.