A cash drawer is a container for holding money. It may be a simple open box, or it may have a hinged cover.
Cash drawers are used by businesses to hold money collected from customers. The cashier can open the drawer to access the money, and then close it when they are finished. This prevents the money from being scattered around the business and makes it easier to track.
A cash drawer may also contain a receipt printer. This printer prints a customer receipt, showing the amount of money they have paid.