Can be used directly from freezer to microwave! Extremely durable, practically unbreakable due to its tempered glass material. Air/water tight seal (4-point safety cap), with no leaks and unpleasant odors. Suitable for electric oven up to 120ºC (without the lid) and safe for microwave and refrigerator/freezer. Safe and healthy for storing food. Easy to clean in a dishwasher.