Made of highly heat-resistant Borosilicate Glass- our food containers are easy to clean- microwave- and dishwasher safe (without lids). Each Glass Food Container features four easy open-and-close latches- which provide an air-tight seal to lock in freshness- and rule out leaks. Six pieces can be nested together to form a perfect set- and to save space. BPA free.****Features:*** 6pc packed*** 3 Nest Pack + Lids*** Made Of Glass*** Small holds 330ml- Medium holds 830ml and Large holds 1700 ml*** 400 degrees F Heat resistant glass