This steel and glass container is ideal for everyday fridge storage, single-meal portions, and batch-cooked leftovers. Features a durable, microwave-safe steel base paired with a toughened glass lid, giving you a clear view of your food. The press-down lid creates an airtight vacuum seal, locking in your food and keeping it fresher for longer. To seal: Press the lid down firmly at the corners leaving the vented, all silicone corner til last.To open: Lift the venting corner first to release the seal. Microwave use: This container is microwave safe and can go in the microwave with the lid on or off. If using with the lid on, lift the venting corner slightly to release steam. See our FAQs below for full microwave care guidance. Important: The vacuum seal only works when food is at room temperature or cooler. Hot food releases steam and moisture, which prevents the vacuum from forming — let food cool before sealing to ensure it's fully leakproof.