Sportlife Stainless Steel Water Bottle Insulated Tumbler Vacuum Thermos Cup (Green, 17oz/500ml) 100% Brand New and High Quality Best choice for school,office,outdoor travel. Style: Cute. Material Type: Stainless Steel. Designed for use wherever you go,this stainless steel thermos bottle is practically indestructible. The thermos bottle keeps beverages fresh and either hot or cold no matter where you are or what you are doing!