Buy a pack of water balloons from the dollar store.
I put a 16d in the tip, roll on a ballon. Works great for me on those rarely used colors like black.
Sausages and bulk guns are for production, caulk tubes arn't.Caulk tubes are for production. If I use 2 cases of caulk, I don't worry about throwing away half a tube. If I want a little bit of glue or something, I try to get that in a little squeeze bottle.