NIB 4 pack Color changing tumblers

Perfect for summer and kids! These change color depending on temperature of liquid inside. I stuck these in freezer for a few seconds to see the change, but I didn’t separate them to see all the colors. These are NiB 12 oz. Tumblers They’re very cool, my grandchildren love the cups that change colors with cold drinks in them. Each cup has a lid and a straw. BPA free. All my items come from a smoke free home. Let me know if you need more pics.