Made of Heat-resistant glass, Silicone. Maximum temperature differential: 120℃ / 248℉. Upper temperature tolerance: 140℃ / 284℉.
Do not overheat in the microwave or heat without water. Do not overheat in a microwave as it may cause water to overflow. Remove the lid when heating in a microwave. After heating in a microwave, the container becomes very hot. Use mittens to hold. 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 on a wet cloth or a wet surface. Keep it horizontally as the container is not completely sealed. Do not hold by the lid when carrying, as the container might fall and break.