Hand-pump Silly String

I read yesterday of soldiers who, in their uncanny ability to learn new ways to not die, have started using silly string as a way to detect tripwires when entering a building. By spraying the stuff across a room, they see it dangle off of tripwires (which are otherwise nearly impossible to detect).

Problems: A) The military does not provide Silly String, or any other competitive compressed foam string product, as a standard equipment. So soldiers must find it on their own. B) Silly String is an aerosol product, that therefore cannot be shipped by well-meaning civilians to their soldiers.

Solution: A hand-pump device (link two) that creates a pressurized environment from which to expel string foam product. It's aerosol free and therefore mailable to wherever. It's also not as dangerous to leave in the heat or fall on, because it is less likely to cause shrapnel wounds should it break.