BPA Free Dishwasher- safe without the threat of toxins. Transparent Lid Weather-proof clear lid to keep an eye on the status of your remaining drink. Vacuum Insulation 2 layers of insulation .keeps liquid hot for up to 6 hours, cold for up to 12 hours. Service Support We are committed to better customer service - from you to your family. If you have any questions or not satisfied, please contact us. DOUBLE WALL VACUUM INSULATION: Enjoy Beverage Cold or Hot.Under normal temperature, it can keep a tumbler of ice cake for 12h until the ice totally melt, or hot coffee warm for 6h MATERIAL DURABILITY:18/8 food grade stainless steel body,NO BPA, healthier than plastic cup. The insulated tumbler never sweat due to the Vacuum insulated design. Powder coating on the outside fits more comfortably in your hand, looks good, anti-slip EASY CLEANING: hand washing is recommended, electro-polished interior doesn't transfer flavor no metal aftertaste, you don't have to worry about your morning coffee or afternoon teas being ruined APPLICABLE TO VARIOUS OCCASIONS:vacuum travel tumbler great for outdoor adventure, road trips, sports event, also the perfect travel cup to bring coffee from home to work or fill a tumbler of drink before you go to bed to drink through the night CUP HOLDER COMPATIBLE ：30 oz Tumblers are sized to Fits most cup holders