At one point I got pretty good at making leather beer cozies, using Al Stohlman's method from The Art of Hand Sewing Leather, and figured it wasn't a big leap from there to a full-blown leather mug. I looked into beeswax and pitch to line them, but realized that those may not do so well with hot beverages which is how I came across the idea of using epoxy from a post on LWN. It occurred to me that even with epoxy, the mug could be a pain in the neck to clean, so I re-thought things a bit and came up with the idea of just making a leather wrap for a glass mug that would be easy to clean: dishwasher safe, even! Most mugs have sloped sides which would make the wrap need to be an odd shape, but with some research I came up with these straight sided mugs from Libbey. After a couple of iterations my final solution is shown here.