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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
Because people buy them, they won't stop making them whilst they sell. Stop buying them and they'll stop making them. It's not like the are necessary.