Karat® polypropylene and premium polypropylene containers are made of high-quality polypropylene, equipped with pull-lock tabs, and can handle temperatures from -14°F to 220°F. Ideal for hot, fresh food and microwaving, featuring four vents. These containers are very sturdy and versatile, making them suitable for all types of food packaging. Food Container Type: Hinged Lid Container; Material(s): Premium Polypropylene; Material Type: Plastic; Color(s): Black/Clear.