Double Wall Vacuum Insulation - stainless steel tumblers are double walled and vacuum insulated, which keeps your favorite beverage hot 3 hours or cold 9 hours. Stainless Steel Tumbler - 304 stainless steel travel tumbler. Elector polished inside. Colored powder coated finish on the outside. Ensure your portable coffee mug unbreakable, rust resistant, sweat free, Non-toxic and harmless. BPA Free Lid - The lid is pop off, made of AS, chemical-free. It comes with a removable rubber gasket. no snap top, wide mouth design and drink hole on the top. The lid does not have hidden places to build up crud. Fits Most Cup Holders - 30oz Insulated tumblers easy to fit into most car cup holders. Carry around your beverages whether home, office, picnic, hiking or camping adventures. Satisfation & - products help you stay cool, refreshed and hydrated for an active, on-the-go lifestyle. We provide the best quality water bottle and value to our customers.