DOUBLE WALLED - Double walls keep drinks hot for up to 6 hours and chilled for up to 12. The double-walled feature also prevents condensation and burns, preserving the temperature of the bottle's contents. KID-FRIENDLY AND PERFECT FOR GROUPS - Conveniently packaged as a set of four, perfect for family outings, parties, conferences, and picnics. Completely shatterproof, they're safe in backpacks, school bags, children's hands, and on your desk at work. (Tumblers are not leak-proof) PROTECTIVE LID - Prevents spills and protects your drink from dust, dirt, and flies. A non-slip seal completely covers the bottle for complete protection. For hot drinks, a thin straw can be inserted with the lid closed. perfect for outdoor events and long gatherings. ERGONOMIC DESIGN - Sleek and stylish with a smooth stainless steel straw for a comfortable grip and pleasant drinking. The wide opening makes it perfect for infusing drinks with fruit or ice and for easy cleaning. Please note that this tumbler should only be hand washed due to its delicate nature. GLAMOROUS GIFT - Give joy to someone special with a gift that is useful yet beautiful, robust yet elegant. perfect for housewarming parties, birthdays, and holidays. Especially lovely as a farewell gift as they are very travel-friendly and fit in all standard cup holders. Color: white Material: stainless steel Size: 21 x 7cm cleaning brush: A-1 PCS Package contents: 4 x thermos cups 4 x straws 1 x cleaning brush Only the above package content, other products are not included. Note: Light photography and different screens may cause the color of the item in the picture to differ slightly from the real thing. The measurement allowed error is +/- 1-3cm.