A frozen soap bubble on the hood of a truck. Soap bubbles blown outside, on a really cold day will freeze. You have to blow the bubbles up into the air, so they have time to freeze, before they hit the ground. As a soap film is mostly composed of water it can of course be frozen. A frozen bubble can last for a long time. When it is kept below 0 degrees Celsius, the evaporation from the bubble will almost be stopped and it will not break.
Photo credit: Paul Pendlebury