Creo Collapsible Airtight Silicone Food Storage Containers, Freezer to Oven Safe, Set of 2 Set includes 500ml and 1000ml storage containers Transparent containers are collapsible for easy storage Oven, microwave, freezer and dishwasher safe Airtight lid with vacuum seal is leak-proof and keeps food fresher longer BPA-Free silicone is safe to use at temperatures from -40F to 446F