Tree-Free Greetings 16-Ounce Sip 'N Go Stainless Lined Travel Mug, Aunty Acid Sister Brother (SG78619) Premium quality 16-ounce travel tumbler for hot or cold beverages Stainless steel inner layer, comfortably curved acrylic outer layer BPA free and Proposition 65 compliant Hand wash only, not dishwasher safe Sister Brother themed Aunty Acid art