★VACUUM INSULATION TECHNOLOGY★ Double-layer vacuum mug wall and three-layer mug bottom make it excellent in heat preservation and long in lifespan. ★18/8 STAINLESS STEEL & BPA FREE★ The 18/8 stainless steel makes the mug safe enough for direct contact with food. The mug lid is made from AS+PP, which is BPA and odor free. Thickened and widened mug lid and seal ring make it spill-proof. ★BRILLIANT PATTERN★ Colorful designs make it stand out from ordinary thermal mugs and give you more possibilities. Transfer printing makes designs of the mug vivid and the natural folding marks have drawn the nice outline of the mug. ★HUMANIZATION DESIGN★ The upper part of the tumbler is of a large size for easy cleaning and bigger volume. The lower part is smaller for easy holding and matching cup holders in most cars. The lids and seal rings are made thicker and wider for better leak protection than similar products. The pull-up design of the push-button lid enables one-hand operation. ★GOOD QUALITY★ Our products have been subject to many times of heat insulation tests and the insulation effect is guaranteed. We are always enhancing details and quality in the hope the customers can get quality of top brand with less money spent. Vacuum Thermal Preservation Technology Double-layer vacuum thermal preservation mug wall, stretched liner and three-layered mug bottom can protect the vacuum structure of the mug and minimize heat transfer through the medium to achieve effective thermal insulation.. Each thermal mug shall pass the thermal insulation test to ensure the vacuum effect good enough for 24-hour cold insulation and 8-hour thermal preservation. Detergent and water are good enough to make the outside wall of the mug clean, and then you just have to wipe it with tissues. 18/8 Stainless steel Jormungand thermal mugs have applied food grade 18/8 stainless steel, and the thickness of mug wall and liner has reached 0.5-0.6mm, making it strong and durable, and also bringing security to consumers. The lid is BPA and odor free. We always hope to bring you the best products and the best user experience. Brand:Jormungand Weight:1.17lb Volume:40oz Material:18/8 steel Duration of Thermal Prevention：8 Hours Duration of Cold Insulation：24 Hours If you have any questions, please contact us directly through the buyer message. We will reply within 24 hours.