4 ms·
I always heard this as an upright cup of frozen water with a penny on top. If you come home and the penny is inside the ice you know the freezer went out.
by teej 6y ago
I always heard this as an upright cup of frozen water with a penny on top. If you come home and the penny is inside the ice you know the freezer went out.
- miked85 6y agoSeems a bit easier than covering your freezer in red food coloring
- lxmorj 6y agoThat is a much cleaner method
- thaumasiotes 6y agoI think it bears mentioning here that you need to choose a cup that can survive the expansion of its contents. Or in other words, not a glass cup.