Lock Cup - A cup that is designed for people who share workplace facilities such as a kitchen. The cup has a hole which prevents people from using it. Only the owner of the cup can use his shaped key to close the hole, pour the coffee and enjoy the drink.
Info Tray - The confusion that often arises when serving coffee to your guests - "whose drink is it?" is resolved with a plastic board positioned on the bottom of the tray. It allows you to write information about the contents of the various cups.