Tree-Free Greetings Rings on Rainbow Background Sip 'N Go Stainless Steel Lined Travel Mug, 16-Ounce Premium quality 16-ounce travel tumbler for hot or cold beverages Stainless steel inner, comfortably curved acrylic outer BPA free and Proposition 65 compliant Hand wash only, not dishwasher safe Show your support with this Rings on Rainbow Background tumbler