This was another case of a clever, unique idea coming from a commission. In this case, one of my wife's co-workers requested a sort of holster for their mason jar. I'm actually not sure if it should be called a holster or cozy or what, but holster seems to be sticking for now. Some of the geometry was a little tricky to work out but I've been using the prototype for a few days now and it's pretty dang handy. I made a little belt loop too so it can hang from my belt while I walk around PAX next week. An excellent little project!