Cambro Manufacturing Co. Snap-on covers that fit tightly, yet can be easily removed. Made of crystal clear, virtually unbreakable Camwear polycarbonate. Stain-resistant to food acids and oils. Withstands temperatures from -40 to 210 degrees;F. WARNING: This product contains chemicals, including Bisphenol A (BPA), known to the State of California to cause cancer, birth defects and other reproductive harm www.p65warnings.ca.gov.