Filled with soapy detergent would make an excellent wasp nest killer,with plenty of SAFE range.......
Long before I was into airguns, I would look at some of the fine bore stainless tubing I have and larger bore aluminum tubing dreaming up ways to build an adult, all metal "Super Soaker" I would tell my friends it would be able to put an eye out at 20 yds and take an arm off at 10.Of course I know physics would not allow that, at least not at my skill level, but it was fun to daydream about it.
Hmmm... I wonder how they would hold up to some of my 'creek water'.Wouldn't I be the life of the party?INCOMING !!!
Ryobi handheld cordless pressure washer