Amazon has the Ember 14-oz. Smart Mug 2 (CM191402US, Stainless Steel) for $109 with free shipping. List price: $150. Features 120°F - 145°F temperature control, IPX7 waterproof. Our updated smart coffee mug's extended battery life keeps your drink at your preferred temperature (between 120°F - 145°F) for up to 80 minutes on a full charge or all day on its redesigned charging coaster. #1 Best Seller in Mugs.