The Lock and Lock Euro Glass Rectangular Container is ideal for storing, heating and freezing left overs. The reddot design award winning Lock ; Lock Borosiilicate glass is leak-proof, airtight, oven proof, microwave and freezer safe. Backed by a limited lifetime guarantee we believe you will be hard pressed to find a better container on the market. The glass is oven safe to 400degrees and will not shatter or break on its' own in an oven. It is also 10% lighter than tempered glass and will not fog up or be as hot to the touch after being heated in the microwave. Constructed from Borosilicate Glass, Boroseal glass containers are safe to use from oven to table and are heat resistant to 400°C Patented four-hinge locking system with a silicone seal ensures the container is 100% liquid and airtight, keeping food fresher forlonger Suitable to transport food straight from the oven to the table; or freezer to the microwave in onestep Stain and odour resistant material, preventing the container from absorbing food smells after multipleuses Resists salt and oxidation