Uses: Convenience meals, takeaway meals. Material: Polypropylene. Temp Range: Able to be microwaved. Can only be frozen if the tray contains added polymer. Shape Retention: Ideal. Grease & Oil Resistance: Above average. Heat & Loss: minimal. Safety: Cost effective solution for transportation of takeaway meals. Lidding Options: All containers have a compatible lid available. Environmental: Able to be recycled at most collection deposits in NZ