EarthChoice™ SmartLock® hinged lid containers are made from Talc-Filled Polypropylene which contains on average 40% less plastic polymers than standard polypropylene containers. This hybrid material is microwaveable up to 250° degrees F (121° C) and is ideal for your hot food take-out menu items. The textured sidewalls provide secure handling. The soak through resistance resists grease, moisture and helps to eliminate messy leaking.