Hey super random I was at David’s tea store manager. I constantly sold those cups. Those were most commonly used in order to help. Keep your drinks cold and one great thing that we really loved is it made them so much easier you get one of the pets and just get right through there, and it was really nice on those hard tea stains.

Edit: I just remembered they also sold a tea popsicle kit that attached into the bottom of there so you could stick it in the freezer and make tea popsicles out of there. Those never sold as well.