Why does the ice cream bag in the refrigerator swell?

Ice cream will become bigger after freezing, so the bag will expand, but it will not affect eating.

It is normal to encounter this situation, because the popsicle will become larger after being frozen in the refrigerator, so the bag will also rise.

The shiny "powder" stuck on the popsicle is a small ice crystal formed by water vapor in the air meeting the popsicle with low temperature, which is a phenomenon of condensation in the refrigerator;

The "white smoke" on the popsicle is a kind of liquefaction phenomenon, which is caused by the condensation of water vapor in the air when it meets the popsicle with low temperature.

Sweating on the outer wall of the teacup is a small water drop condensed when the water vapor in the air meets the teacup with low temperature, which belongs to liquefaction.