Last night I woke up at like 4am, tried to take a drink of water, and realized that I'd left the bottle in the freezer. I put it in there sometimes to cool it down quickly, just for an hour or so. Got up, pulled out the bottle without turning on the lights, and almost made it back to my bed before I felt the bottom and realized it was all jagged.
That piece of the bottom had been left behind, covered in ice. I guess it's a good thing it didn't explore more spectacularly, and that I noticed relatively soon.
