17 Ounce Vacuum Insulated Travel Mug, Stainless Steel by 11years Stainless Steel Mug ,Stainless steel vacuum insulation keeps beverages hot or cold for hours Travel Mug,food-grade silicone seal ring ,high temperature resistance not easily deformed,leakproof higher performance,carry more convenient Vacuum Mug Insulated Mug, the vacuum heat insulation process ,insulation and cold preservation time is more durable ,high quality stainless steel ,material tenacity,safety and health 17 Ounce,compact design takes up minimal space while maximizing capacity Wear resistant cup bottom,effective anti rollover slip