Spill-Proof Lid: The lid seals tightly with a rubber seal gasket which prevents spills and can be easily opened to drink from.

Safe Material: BPA free, Food grade 18/8 (304) stainless steel, eco-friendly and non-toxic.

Keep Drinks Hot or Cold: You will definitely love this Stainless Steel Tumbler! 
The double wall vacuum insulated design keeps drinks cold for 9 hours or hot for 3 hours.