Tumbler Travel Mug - Premium Grade Stainless Steel Double-Walled Vacuum Insulated 30 oz + Crystal Clear Lid &ndash; Keep Cold Drinks Cold + Coffee / Tea Hot, Eco-friendly &ndash; Built to Last a Lifetime Check out our Stainless Steel Straw which fits perfectly with your new ZERO tumbler and add to your purchase! STEEL TECH: Double-walled, vacuum insulated - made of premium grade stainless steel 18/8  keeps drinks COLD or HOT much longer than plastic, low grade metal, glass or ceramic. CLEAR LID: So you can see your drink plus a fast flow opening with room your ZERO Brand straw. NO SWEAT: No condensation, so no coaster needed  place it wherever youd like. ZERO Waste  ZERO BPA  ZERO Leaching  ZERO Toxicity  ZERO After Taste