Materials: 18-8 Stainless steel (powder coating) Copolyester, Silicone
Upper temperature torelance: 100℃/212℉
Keep drinks hot (70℃/158℉) for 1hour. Keep drinks cold (10℃/50℉) for 5hours. 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. When using a dishwasher, please store them in the upper basket to avoid force and weight applied to them. Keep out of reach of children.