Sur La Table 10-Piece Glass Storage Container Set FE-10PG10PRO, Blue Our glass storage containers are perfect for leftovers, lunches on the go, picnics and more Made of durable tempered glass, our containers are oven-, freezer- and dishwasher-safe and are extremely resistant to thermal shock Each container features a locking lid with a vent that allows steam to escape when reheating and a silicone gasket for a tight seal Lids and containers are BPA free