DOUBLE WALL - Double walls keep beverages hot for up to 6 hours and chilled for up to 12 The double wall feature also prevents condensation and burns, retaining the temperature of the bottle's contents.KID and CROWD FRIENDLY - Conveniently packaged as a set of four, these are perfect for family outings, parties, conferences, and picnics. Ultimately shatterproof, they are safe in backpacks, school bags, the hands of children, and on your desk at work. (Tumblers are not leakproof)PROTECTIVE LID - Avoids spills and protects your drink from dust, grime, and flies. A sliding seal completely covers the bottle for total protection. For hot drinks, a thin straw can be inserted with the cover closed. perfect for outdoor events and lengthy gatherings.ERGONOMIC DESIGN - Slim and sleek with a smooth stainless straw for comfortable gripping and pleasant drinking. Its wide mouth makes it perfect for infusing drinks with fruit or ice and for effortless cleaning. Please note that due to its delicate nature, this tumbler should be hand-washed only.GLAMOROUS GIFT - Bring joy to someone special with a gift that's useful yet beautiful, sturdy yet sleek. perfect for housewarmings, birthdays, and holidays. Especially delightful as goodbye presents as these are very travel friendly, fitting in all standard cup holders.Colour:SilverMaterial:stainless steelSize:21 x 7cmcleaning brush:C-4 PCSPackage Contents:4 x thermos cups4 x straws4 x cleaning brush Only the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.