Hi all, long time lurker, first time poster. Figured I'd share a project I did recently to serve some brew at a friends wedding. Couple of boxes built with 1/2" ply, and insulated with 1" rigid foam. Uses standard taps and beverage line length to keep serving pressure the same as my home kegerator. 20 oz co2 tank with paintball adapter, regulator, and splitter for serving 2 kegs. Chalkboard paint on the face to show what's on tap. I lined the inside with a contractor trash bag and filled each box with about 10lb of ice. Kept everything cold for at least 5hrs in 100 degree weather until the kegs tapped. Used a folding dolly from HD to roll the boxes around. Suprised how well it worked!