If you have plenty of Indian supermarkets - they'll likely have little stainless steel lidded canisters called "puri dabba". They come in a variety of sizes and are pretty cheap - £2 to £3 each. I've got a few at 95mm diameter which are big enough to hold a normal sized puck with a bit of swirl room. Sharon's Nanny's Soaps also used to come in them (but in a slightly smaller size).
They look good and work well.