The problem: Every time when I bought a drink from the cafeteria during break time,  if I didn’t finish the drink before class, it must be put in my locker. But my locker is very messy,  the drinks might be spilled inside my locker.

Solution: So I want to make a small bag, put it on the side of my locker, then I can put the drink in the bag and make sure that the drink will not be spilled.

Inspiration: From garbage bag