Sorry to be the one to report that these glasses have been found to carry dangerous levels of lead and cadmium
Only the Cheer BearandGrumpy Bear glasses have been tested, but considering that all the paint tested on those two - including the white belly paint that appears to be shared by all the glasses - have lead and cadmium, it’s a safe guess to assume they’re all unsafe.
So uh. Maybe don’t buy these if you intend on drinking from them. And if you have been drinking/using them, you should maybe probably stop doing that.
Especially if the paint looks to be wearing off. That’s the part that poisons you.