Review on Vibrant Color Changing Cups, Tumblers, and Straws: High-quality Food Service Equipment & Supplies for Tabletop & Serveware by Justin Peck

My grandchildren love these mugs. I have one who loves everything cold and the other is hot. They like to change color and thereby drink the whole cup of liquid. Tops are a bit tricky to put on and take off, but it gets easier with practice. They're easy to clean and girls love watching the mugs dry because they change color. Who knows, they might even start washing them! giggle