Before I left for my last overseas trip, I got to shoot some 105mm rounds from a Gunship (covered in The Big Guns). Most pilots know that rounds from big guns can be turned into drinking containers; hell, the 20mm shells from the F-16 can be seen in the form of shot glasses in many Squadron bars. Gunship guys must have a hell of a tolerance. I think I can only handle a single fill-up from the mug I got my Gunship brass turned into.
I still need to get the inside lined (I’ve heard a large Taco Bell cup works well as a liner). But there you have it: one big mug. A 25mm handle connected with smaller rifle shells to the 105mm drinking shell. I think all said and done, it holds at least 2 liters-worth of beer.