1.SAVE YOUR MONEY AND VALUABLE TIME : The tumbler and the necessary accessories (2 straws, straw brush, straw lid,sip lid, handle) are put in an elegant gift box with only half of price compare with other brands. This gift set will definitely make you feel great when you give to your friends as a gift, or use it by yourself in the office, traveling, fitness , and hiking..2.VACUUM INSULATION The drink to have no heat transfer or heat transfer media, Your beverage will truly stay as hot or cold as long as possible. Retire your coasters and koozies. Even filled with ice or boiling water, the tumbles will never sweat or get hot to the touch!.3.COLOR POWDER COATING The coating will not be dispelled, faded, and it will be difficult to scratch. The outer characteristic of the product provides additional grip to the mug, which makes it very convenient to take along with you for any outdoor activity..4.18/8 STAINLESS STEEL Our inner and outer walls all use 0. 5MM 304 Food Grade stainless steel, which allows the cup to withstand bigger impact. The inner wall is stretched and electro-polished without any gaps, So It will never rust or leave a bad metal taste in your mouth,and very easy to clean..5.100% SAFETY GUARANTEE Safety is our utmost priority, That's why we never use recycled materials in our products, no PBA, no heavy metal exceeded. We provide a lifetime warranty as well as 100% Satisfaction or full refund. Get the product and get a real taste of an excellent coffee cup set.