Milk level indicator

thingiverse

I'm catching up on the icebox challenge a bit behind schedule, but I came up with a quick little idea for tracking milk and juice. When the carton comes out of the fridge, move the indicator and slide it back in to get an instant reading. It's easy as pie! Adding two rubber bands makes it even more convenient. This clever trick also works great on bottles and pesky Pringles cans - any container that you can get rubber bands around will do the job just fine.