The Starbucks Online Exclusive Color Changing Hearts Reusable Hot Cup 16oz (Set of 2) is a limited edition Starbucks tumbler set of coffee bean tumbler that is available exclusively through Starbucks online store. These Starbucks tumbler sets feature a fun and unique design that features hearts that change colour when filled with a hot beverage. Each Starbucks tumbler and coffee bean tumbler has a 16oz capacity and is made of durable plastic material, which makes it perfect for hot drinks.