Anchor Hocking's premium TrueLock Locking lid collection offers a leak resistant design, no more worrying about spills. Be a meal prep pro with one dish that can do it all, one glass dish goes oven-to-table, table-to-fridge, fridge-to-car, to subway, to work and bonus, it is microwave and dishwasher safe too. The lid is airtight keeping your food fresh. It's bisphenol A Bpa free plastic, so it's safe and never stains. When not in use, lids nest for space-saving organization in your cupboards. Lids are safe to label with dry-erase markers, flat to stack, and top-rack dishwasher safe.