This is an often small refrigerator, on campus, typically located in a semi-dorm, open-dorm or pressure-turbine-energy system lab where college students working together or individually on projects and just chilling keep their nice lunches, drinks, snacks and confectionaries. It's pretty common for them to just leave them there for the next person. Sometimes they do it as a nice gesture or gift. Typically, if something's been in there for atleast 3 to 4 days and no one has picked it up, it's yours. Mainly, though, I'd like to introduce the college tradition. If someone leaves something there and doesn't really come back to get it, it belongs to the next hardworking engineer who comes across it on their spare in or out of class time.