Coin in the freezer: Bizarre life hack protects against poisoning. If the refrigerator defrosts, food quickly goes bad due to the interruption of the cold chain.
All you need is a coin and a plastic cup. The coin is then placed on the ice in the cup and the cup goes back into the freezer. The ice will melt - and the coin will sink - and consumers can be assured of security. The life hack is very simple, but in an emergency it can even protect against food poisoning.