My wife's preferred brand of pre-made iced tea recently slightly changed the packaging for their large-sized bottles. Checked, and sure enough, they dropped from 64oz to about 59oz.

[EDIT] Oh, and in the case of Everything's a Dollar (used to be better than Dollar Tree, dunno if it's still around) and similar: as someone who got a lot of toys there as a kid and has been in a handful of times in the last few years for various things, I can vouch for their toy selection being much better in the '90s.