<b>Details<br /><b /> Capacity: 590ml / 20oz <br /> Materials: 18-8 Stainless steel (powder coating) Copolyester, BPA Free<br /> <br /> <br /> ✔️For maximum insulation efficiency, preheat or precool the tumbler prior to use by filling in a bit of hot/cold water for 1-2 mins. Do not use in a microwave or oven. Do not place near open flames.<br /> <br /> ✔️Be careful when drinking hot beverage. Even if the tumbler surface is cool, the drink may still be hot.<br /> <br /> ✔️Do not drop or subject the product to strong impact as it may cause breakage or leakage. Be careful not to pour too much beverage as it may overflow when closing.<br /> <br /> ✔️Immediately wash and dry well after use, then store it away from other metals to prevent rust. Do not leave it soaked as it may rust or break.<br /> <br /> ✔️Wash with care. Do not use abrasive cleansers or steel wool. Do not use chlorine bleach as it may cause rust.<br /> <br /> ✔️When rust spots are found inside the tumbler, add warm water and citric acid in ratio of 10:1, wash with soft sponge after leaving it for 2-3 hours, and rinse well.<br />