Tin Can Locker – A Discreet Solution for Storing Money and Jewelry Overview The Tin Can Locker is a smart and discreet solution for hiding cash, jewelry, small documents, credit cards, memory cards, USB drives and other personal items. The can looks and functions like a regular can you would find in your kitchen, pantry or pantry shelf, but features a hidden storage compartment that allows you to keep important items safe and unsuspected.