Heat-resistant glass. Maximum temperature differential: 120℃/248℉. Microwave safe and dishwasher safe Use only for its intended purposes. Do not overheat in the microwave or heat without water. Wash with care. Do not use abrasive cleansers or steel wool. Sudden temperature change may break or shatter the product. While the glass is hot, do not pour cold liquids into it and do not place it to on a wet cloth or in a wet sink. Product size and shape varies in each item due to manufacturing process. [Outer lid] Stainless steel , Silicone Upper temperature tolerance: 90℃/194℉. Dishwasher safe. Made in China. Do not use in a microwave. Twist and close the lid tightly before pouring. Keep it horizontally as the container is not completely sealed.