You never know when you’re going to need your own shot glass. If you’re going to a party you don’t want to be stuck just using a large cup and only partially filling it for your shot needs. Instead you need to carry around this Collapsible Shot Glass right on your keychain. Plus, when the cops pull you over it’ll be mildly discreet that you have your alcoholic tendencies. You can purchase one of these for $12.85 through Magellan’s Travel Supplies.