Come and see our amazing products. This tumbler is made of high-grade 304 18/8 stainless steel,anti-rust and lead free,unbreakable and stands up to heavy use through every season. Clear press-on lid helps you see what's inside. Double-walled vacuum insulation prevent heat transfer to the outer walls of the tumbler. It means the tumbler keeps your favorite drinks icy cold or piping hot for hours. Soo you could enjoy your beverage cold by the pool,take your cup of joe on the go. The tumbler keep your on-the-go beverages hot for three hours or cold for nine hours,perfect for the office,road trips,camping and hiking,sporting active,picnics. Pls confirm further with us if any query about packing info, inventory status and time schedule.