Clearly made from the finest materials.

Commonly used materials for the manufacture of clamshell and two-piece food containers. All containers are manufactured from FDA conforming PET for direct food contact recyclable material unless otherwise specified.

Material Type
PET RPET OPS L-10A SRB
MATERIAL Polyester Polyester Polystyrene Polystyrene Polystyrene
CLARITY Excellent Very Good Excellent Very Good Good
FDA COMPLIANT TO CFR 21 #177.1630 CFR 21 #177.1630 CFR 21 #177.1640 CFR 21 #177.1640 CFR 21 #177.1640
SPECIFIC GRAVITY (g/cc) 1.33 1.33 1.05 1.05 0.9
TEMPERATURE RANGE (1) 0 ° F -140 ° F 0 ° F -140 ° F 20 ° F -170 ° F -10 ° F -170 ° F -40 ° F -165 ° F
BARRIER PROPERTIES
WATER VAPOR Good Good Fair Fair Fair
GAS Excellent Excellent Fair Fair Fair
OXYGEN TRANSMISSION RATE 5 – 15 5 – 15 350 350 350
CHEMICAL RESISTANCE ¹
ACIDS Good Good Good Good Good
STRONG OXIDIZING ACIDS Excellent Excellent Poor Poor Poor
ALKALIES Fair Fair Excellent Excellent Excellent
HYDROCARBON SOLVENTS Excellent Good Poor Poor Poor
ALCOHOLS Excellent Excellent Excellent Excellent Excellent
FAT, GREASE & OIL Excellent Excellent Good Good Good
SUGARS, SYRUPS Excellent Excellent Excellent Excellent Excellent
TEMPERATURE TOLERANCE ¹
BLAST FREEZER Poor Poor Poor Poor Good
FREEZER Good Good Fair Very Good Excellent
REFRIGERATED Excellent Excellent Excellent Excellent Excellent
HEAT LAMPS Poor Poor Good Good Fair
MICROWAVE Poor Poor Fair Fair Fair
OVEN Not Recommended Not Recommended Not Recommended Not Recommended Not Recommended
¹ Disclaimer—this information is for  comparative purposes only. We strongly recommend that customers test products under their specific conditions to determine fitness for use.