You just picked up some delicious takeout, but you can't dig in quite yet. Maybe you have to walk the dog, shoot off a quick email, or wait for someone else to get home. You can stick the takeout in your microwave and close the door so it stays warm and tastes freshly cooked.
Photo by _e.t.
You're not actually turning the microwave on, however, just using the microwave as a way to insulate the food. Christine Gallary at The Kitchn tested the tip with glasses of water to see if the microwave does help, and it turns out it might buy you some serious time. No matter what you're going to lose a lot of heat, but using the microwave as your takeout storage can extend that "fresh takeout window" by at least half an hour. Compared to setting in on the counter, where your food will start to rapidly cool instantly, it's pretty helpful.
If you have to wait for too long, though, you can always reheat it to make it taste as good as new.