So, I bragged about this elsewhere (MeWe) but this is probably a better-focused place for it. Meet my dice tower/dice storage tray of doom. (Not depicted is the extra spacer in the tower portion that widens the slot sufficiently that I can roll d24s, d30s, and some oversized Chinese drinking game dice I have.) It's made almost entirely of bamboo, has a felt underlay for where the dice roll (or get stored), is held together when packed up by magnets (and indeed magnets are what's holding the dice tower in the corner) and packs up into a small, easily-carried box.