BESTEK&reg; 16oz double wall stainless steel mug thermal insulated vacuum tumbler for water,coffee,tea,milk ect. Keep hot & cold, Leak-proof BTVT550 Keeps hot for 5 hours ( can keep 40 degrees till 12 hours ) or cold for 9 hours with Double wall sta With auto-seal lid. Press to sip. Release to seal. The lid automatically keeps your beverage from le The easy-grip contoured tumbler with rubberized bottom holds up to 16 ounces of beverage and will fi 100% BPA-free high quality material and is backed by a year warranty and easy ex-change / refund pol Hand wash using non-abrasive cleaners. Recommended to hand wash the body.