K2C Eco Reusable Thermos: 17oz customized 304 stainless steel, double-wall insulated thermos for tea and coffee, keeps beverages hot for up to 24 hours, and can keep hundreds of one-use coffee cups out of the environment each year. Many coffee shops even offer a discount when you bring your cup!  You can save even more when you brew your coffee at home and bring it on the go.