EsterSteam® steam-release valve is marketed for the microwave cooking of frozen meats and vegetables and is said to provide consistency through controlled hole size and repeatability of label performance. Reportedly steaming and microwaving foods simultaneously to retain moisture while reducing cooking time, EsterSteam is said to contain liquids without leaking, and is suitable for pouch and lidding applications.

American Packaging Corp., 515/733-1469.

www.ampkcorp.com