【VACUUM INSULATED TECHNOLOGY】 This travel tumbler is with double walled vacuum insulation technology, keeping the beverages hot for 6+ hours and cold for 12+ hours. Sweat proof, no condensation. | 【PREMIUM 18/8 STAINLESS STEEL】 The insulated coffee tumbler is with premium 304 food Grade stainless steel inside, never rust, lead free, easy wash and unbreakable. | 【BPA FREE PRESS-IN LID】 The eco-friendly lid is completely BPA free; silica gasket seals to achieve maximum spill proof capability. Wide mouth drinking hole on the top, straw friendly, with splash proof sliding cover. | 【LIGHT WEIGHT AND CUPHOLDER FIT】 Light weight and fits most cup holders. Slim and easy to carry. Perfect gift to yourself, your family and friends. | 【LIFETIME CUSTOMER SERVICE】 If you have any questions, please contact our customer service and we will reply shortly. We provide 100% satisfaction service if you are not fully happy with the insulated tumbler.