LifeSky Stainless Steel Insulated Travel Coffee Mug, Double Wall Vacuum Insulated Water Bottle, BPA Free Flip Cap for 1-Hand Operation, 16 oz Retains Temperature For Hours: Vacuum-seal technology and double-wall construction ensure superior insulation for hot or cold liquids. Truly Leak-proof: The unique vertical safety lock on the lid seals in your liquid securely. Ensures no accidental spills and allows for convenient 1-hand operation. Slim & Sleek: Fits most car cup holders (2.6" D, 9.5" H). A perfect companion for carrying your coffee or tea anywhere you go. Safe & Nontoxic: BPA-free lid and food-grade stainless steel mean there are no chemicals that can leech into contents. Drink with peace of mind 1-Year Warranty: Buy without risk! If you have any issues with our travel mug within 12 months, we'll replace it at no cost. No overfill so as to leave space for the lid to avoid overflow. Keep your travel mug out of the microwave and the freezer. Carrying filled travel mugs in your bag while on-the-go is not recommended. Hand washing is recommended as the harsher detergents may affect the appearance.