Heat and reheat foods with the convenience of a built-in steam vent using the Lock and Lock Purely Better™ 32-Ounce Vented Round Glass Food Storage Container. Featuring a patented 4-hinge locking system for freshness that lasts longer, Lock and Lock Purely Better™ storage containers are constructed from borosilicate glass, which can withstand both high heat and sudden cooling but is 10 percent lighter than tempered glass for easy, on-the-go use. The airtight and leakproof lid has been durability tested to last up to 3 million uses, and features an innovative steam vent to prevent pressure build-up when foods are heating or reheating. Plus, Lock and Lock Purely Better™ glass containers are microwave, freezer, oven, and dishwasher safe. Lock and Lock Purely Better™ containers are also stain and odor resistant, easy to clean, and come with a Lifetime Limited Warranty for healthy, happy, no-worries food storage. Lock in airtight and leakproof performance with freshness that lasts with the Lock & Lock Purely Better™ 32-Ounce Vented Round Glass Food Storage Container.