I just got back from a week at the beach and wondered if there’d been any storms that knocked out power. I suppose a stinky fridge might have been a clue, but I’d cleaned out most fridge stuff that would spoil before I left.
Basically you freeze it upside down, turn it right side up, and if the power goes out, the liquid in the container will fall to alert you.
This seems pretty cool, especially since it’s reusable. I’m going to order one for my fridge and give it a try. I’m thinking about getting a chest freezer for buying stuff in bulk, so I can imagine if it works the way I expect, it’ll be useful for that too.