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

My kids love it! Everyone has already chosen their favorite color and will wash their mug to use again. They can be used without a lid which is a big plus for me and older kids. It doesn't leak when rolled over it, but if it hits a straw it will leak a little. We all have straws and lids. For a lower price, they're amazing so far! I'll update if anything happens.