I haven't used a tin to store my PSK in years - like the Otterbox I once carried around and the aluminum match safe kit, it just didn't accessorize well with my purse (not joking). At one point I was storing my PSK in an Aveda makeup bag, but now I'm back to the red Witz container.

Walmart has some Witz-like containers where the opening is on the long side (instead of the top, making it easier to access) that Izzy reviewed awhile back. They might also be good options for you.