I've been collecting dice since the 80s. I've been losing dice for a fleeting few seconds less. I have a number of wooden coffers for "the extra". I have a locking plastic case that was my player dice - it is actually a remarkably well made Beta (early competator of VHS) cassette box. But that's been sitting near my computer for the non-VTT online gaming I do. One of my players gifted me a leather hexagonal dice rolling case with lid, and that's my current go-to. It has a groove on the outside to hold dice, and a big area in the center to roll them. It's the only "fancy" thing I have, besides the history of the Beta case.