The Kitchen Details 1200ml square glass food storage container is crafted from high borosilicate glass engineered to resist thermal shock and withstand heat up to 750°F, making it safe for the oven, microwave, and freezer. The FDA-approved food-grade PP lid fits snugly to deliver an airtight, leak-proof seal that locks in freshness and prevents spills during transport or refrigerator storage. At 5.1 cups, this large square container is ideal for family meal prep, batch cooking, soups, casseroles, and bulk leftovers, and its sleek square shape stacks efficiently to keep your kitchen organized. The non-porous glass surface resists stains and odors and is fully dishwasher-safe for easy everyday cleanup.