The Single Serve Easy Travel MugŪ is specifically designed to fit perfectly under most single serve coffee makers. It features a triple-wall vacuum seal which consists of two stainless steel walls with a copper coating in between. The copper coating ensures beverages stay hot or cold for up to 7 hours. The ergonomic shape of the body is based on the "Golden Mean," which is commonly used throughout art and architecture. The simple push-button top allows you to drink from any side of the rim while the inner silicone seals prevent spills of any kind while the push-button is closed. Made of stainless steel. The entire mug is top-rack dishwasher safe and the lid comes apart for easy cleaning. BPA-Free. 10 oz. capacity.