30 oz Stainless Steel Tumbler by Harcas. Double Walled Vacuum Insulated To Keep Drinks Hot and Cold. Best For Travel, Camping, Office or Home Use. Non BPA. Splash Proof Lid. UNIQUE DOUBLE WALL insulation keeps hot drinks hot and cold drinks cold plus it's safe to hold even with hot drinks inside. Ideal for tea or coffee. 24 HOUR ICE TEST. Harcas double wall tumbler keeps ice for up to 24 hours and hot drinks hot for up to 6 hours. SPLASH PROOF LID (BPA Free). Ideal for travelling and camping. Fits most car cup holders so you can keep it on the go. BPA FREE PREMIUM 304 (18/8) grade stainless steel for maximum durability and insulation. Designed to last a lifetime. BACKED BY OUR 365 DAY WARRANTY & 30 Day 100% MONEY BACK GUARANTEE. We believe this is one of the best 30oz Tumbler out there so we are offering such an amazing guarantee.