Tumbler with Lids and Straws,Reusable Stainless Steel Vacuum Insulated Tumbler Cup,Iced Coffee Travel Mug Water Bottle 20oz(590ml) Safe Material This tumbler travel mug is made of food-grade 304 stainless steel, food grade PP, ABS lid, safe and durable, can keep drinks hot for up to 6 hours and cold for up to 18 hours, the high-quality stainless steel and the double-walled insulation design ensure beverage can stay either hot or cold over time. Lid Design The center hole of the lid is specifically designed for straws, 2 types of stainless steel straws are provided to sip on your beverages casually and a straw cleaner will keep your straw fresh and pristine; the edge hole that you can hot drink dicrectly; a discharge valve on the lid more convenient for your drink. Insulation and No Sweat Double-layer inner and outer 304 stainless steel cup + vacuum insulation layer to ensure insulation performance, non sweat outside,retent heat or cold throughout your sleep time or busy working hours, which ensure your drinking experience. Tips Dishwasher cleaning is not recommended. Do not bubble water for a long time (no more than 30 minutes). Do not add alkaline and acidic ingredients in the vacuum cup to avoid cup of corrosion. Why choose us? Other tumblers are solid colors, which is monotonous and tedious, and some processes are immature, which lead the paint peeling off. Our products come in a variety of different patterns, which use a mature coloring process, which guarantee the beauty of the product, there will be no peeling off. Elegant and durable. If you have any questions or after sales can contact us at any time.Thank you!