Designed using innovative features to make your special treats stand out on the shelf and look irresistible, this Hinged 6-Count 2.5" Cupcake Container provides high-clarity PET, clean aesthetics and innovative, high-performance design features that drive impulse sales. It is refrigerator-friendly so it performs well in refrigerated applications for extended periods of time. Durable, rigid construction reduces crushing when exposed to moisture in moist environments, such as in some packer processors, refrigerators and inside of freezers. Recommended service temperature ranges from zero to 130 degrees Fahrenheit. PET material of the rectangular container provides a water\/oxygen barrier to preserve longer shelf-life.