People laugh at me for… well, for any number of reasons. One, I like to believe, is that I’m funny. Another is (probably) my compulsion to have a spare of .. just about everything. So when I got my nice 21-oz. double-walled glasses, I observed the height-to-base ratio and immediately ordered a spare pair. This morning the inevitable finally happened: I backed into a glass sitting near the edge of my rolling kitchen island, and being a tumbler, it tumbled.
After a brief search, I found the spare pair, and now I still have a working pair plus an extra glass should one break.
BTW, these are a much better shape and the ones I would now recommend.