
The air pressure in the overhead bin on the way back really fucked with this can (though not the other one), and so it collapsed inward some.
So, when I got back, I kept it in my fridge and used it first (the seal had actually broken inside and the top popped off, and there was ground coffee all over my carry-on), and then before putting it up for display, I got a hammer and tried to hammer out the major dents in the can.