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Batteries in a disposable lip gloss dispenser
(feddit.it)
And the label doesn't say anything about it, doesn't have the "don't throw in the trash" logo.
Those LEDs are glued in, there's no way to remove batteries before discarding the item
They do it because "protect the children" is an easy sale, everyone falls in line because nobody wants to be against something "for the children". Also the reason why the horse gets beaten over every internet censorship attempt.
"protect the children" is an easy sale until you want to actually do something to fix the leading causes of child deaths, like say road injuries..