Sistema Microwave Rectangle containers have been specifically designed for microwave cooking and reheating, and are great for leftovers and meal prep. A steam release vent in the lids allows for splatter-free reheating, while the easy-lift tabs on the lids make transporting from microwave to table simple. These durable microwave containers are top rack dishwasher-safe, fridge and freezer-safe, and microwave safe with the vent open. Designed and made in New Zealand, they're also phthalate and BPA-free, and eliminate the need for disposable, single-use plastic.