These food containers are made from tough borosilicate glass that is even more shatterproof than tempered glass, making them environmentally friendly and long-lasting. The lids are LocknLock's iconic Eco lids, made from leftover production plastic to ensure nothing is wasted; lid colours may vary as no two pieces are the same. The containers are dishwasher, microwave, and freezer safe, as well as BPA-free. The lids lock on all 4 sides for an airtight and leakproof seal, perfect for preventing spills in your fridge, freezer, or on the go. The glass dish is oven safe up to 400°C, allowing you to cook and store your culinary creations in the same dish. This set includes 3 x 500ml LocknLock glass square food storage containers.