My 13 yr old grandson and I freeze water in 1 gallon milk jugs, or 2 liter soda bottles, and put them out at the 65yd line, adjacent to the swinging steel targets. We use the Saint Edge, his Ruger 10/22, and the XD Mod2 9mm to hit those. When done, empty any ice left, and toss the containers in the trash barrel. Less stuff to carry home.