Optimal baking and premium food storage versatility have arrived with this ultimate set of lock-performance glass Bakers. Crafted from thermal shock-resistant borosilicate glass, this set of 9-inch x 13-inch bakers with lids and an 8-inch x 8-inch square baking pan with lid is designed to be more durable but still lighter and easier to handle than regular tempered soda glass. Plus they're much more resistant to cracking and breaking when exposed to extreme temperature changes, so feel free to cook, freeze, and reheat that lasagna, mom's signature casserole, or roasted brussels sprouts without worry. These one-of-a-kind glass baking dishes also come with a unique 4-hinge locking lid sporting a double silicone gasket to seal air out while locking freshness in, keeping foods ready-made and delicious for days on end. With a clean, minimalist profile and grippable rims instead of bulky handles, Lock & Lock glass bakeware containers are the best for space-saving storage in the fridge or freezer, too (not to mention being great for baking in small ovens!). These odor-free and stain-free glass bakers are dishwasher safe for quick cleanups and oven safe to 750 degrees F to accommodate any bubbling casserole, zesty pasta bake, or gooey brownie bar recipe thrown its way (lid not intended for oven or microwave use).