A most versatile range from ClickClack these glass containers are designed in the perfect sizes from those little left-over amounts to a lunch portion and a great storage container for the fridge or freezer. Take from the fridge or freezer, open the vent, and put it straight into the oven or microwave. Made from Borosilicate glass, with a high-temperature silicone lid. Oven, microwave freezer and dishwasher safe. It will tolerate temperatures of up to 200oC for the Lid and 300oC for the glass base and as low as -20oC. Clean before initial use, this item is dishwasher safe.