Based on this exact comic - which I surely must have read in the newspaper at the time in 1987 – when I was a kid I saved a snowball in the freezer. What I did not know until later, and was mildly disappointed to discover, was that parking it directly on the floor of the freezer compartment put it in contact with the defrost heater mechanism. Which caused it to melt away to nothing by summer.
Darn it.
Or worse. It froze it into an ice cube. So when you threw it you might as well have yeeted a rock into your sister’s face. Mom wasn’t happy.
I put mine in one of the middle drawers, and didn’t encounter any problems with the defrost heater. But despite wrapping (loosely) it in plastic wrap, it still shrank through sublimation over a few months.
You got Calvin’d!