This was a take-out container — the sort that Chinese restaurants locally have invested in, much to the delight of people who store leftovers in their refrigerator frequently. It survived numerous trips to the microwave without issue, and was last seen storing leftover spaghetti.
I’m not sure what I find more confusing: the fact that it’s melted, or that it was still storing leftover spaghetti in the refrigerator after it melted.