Pack of 6 Borosilicate glass : Highly heat resistant, the glass can withstand temperatures up to 300°C. Superior thermal shock resistance: The glass can be taken from your freezer at -20°C and put straight into your oven up to 200°C (without lid) Suitable for fridge, freezer, microwave, oven and dishwasher use. Hygienic material: Glass does not absorb or transfer food stains, colours or odours, it is long lasting, durable and scratch resistant. Your glass will always look as good as the day you bought it, no more orange containers!!! Microwave safe lid - airtight and liquid tight with two handy steam valves for reheating , BPA Free. Lid suitable for fridge, freezer and dishwasher use. Lid not suitable for use in the oven. Suitable for fridge, freezer, microwave and oven (without lid) dishwasher