A basic wallet with two compartments that slide out. It can fit about 8 credit cards in one compartment and 16 total. I suggest printing the compartments upside-down with the rails on the plate and the shell facing upwards so that the closed side is on the plate and the open side is facing up. You can find it on Thingiverse at https://www.thingiverse.com/thing:6414148 and Printables at https://www.printables.com/model/688331-slide-out-wallet