Safe to use in Oven and Microwave.
Lock & Lock Glass is a glasslock made of high quality borosilicate glass.
Borosilicate contains boric acid which is highly heat resistant.
Thus, borosilicate glass withstands sudden change in temperature.
When The glasslock is broken by physical shock, it doesn't break into numerous fragments and scatter,
therefore it is safe and suitable for food container.
So Lock & Lock Glass (glasslock) allows you to use it safely in the oven and dishwasher.