Ice cream is shrinkflated by whipping air into it. They can justify using the same size container, and allegedly selling the same volume, but much of it is just air now.

A side benefit: they can also sell it as "lower calorie" than it was before, since it's diluted with air.

EDIT: interesting to see this upvoted and then downvoted so much. Can someone who is downvoting weigh in? Seems relevant to the topic, and no one is saying it doesn't happen (or that it is happening and they like it).