I used one of the heavy but approved Garcia cannisters ($5 for the week, rented at Tuolumne permit office) and my old aluminum model. I think it has lost approval and is no longer made, but it is larger and lighter than the Garcia and opened on both ends. It is made of a sheet of aluminum wrapped around and riveted to a set of reinforcing ribs, with flat end caps attached by twist lock fasteners.

It's really hard to get more than 3 or 4 days worth of food in one of the Garcias, but my old one would hold about 6 days worth.

Jeff

UPDATE: It was a Gio Enterprises canister and it is NOT currently approved by the Sierra Interagency Black Bear Group, meaning by NPS regulations, either. It was when I bought it, though. Darn!