OXO Food Storage Container, with snap lid, 1 cup / 250ml, round, thermal shockproof borosilicate glass with plastic lid. The plastic lids have four locking tabs for a secure seal. The different sizes nest together and same sizes are stackable for easy storage. Ideal for those extra left overs. Elegant, table-friendly design. Oven, freezer, microwave and dishwasher safe. BPA free.