Fold-Pak is a division of Rock-Tenn

Rock-Tenn

Rock-Tenn Company is a paper and packaging manufacturer based in Norcross, Georgia, United States. RockTenn is one of North America's leading producers of corrugated and consumer packaging and recycling solutions, with annualized net sales of approximately $10 billion...

 with three locations: Fresno, CA, Hazelton, PA, and Columbus, GA. Fold-Pak manufactures Bio-Paks, SmartServ and Fold-Pak - which is commonly used for Chinese

Chinese cuisine

Chinese cuisine is any of several styles originating in the regions of China, some of which have become highly popular in other parts of the world – from Asia to the Americas, Australia, Western Europe and Southern Africa...

 and Thai food.
The design comes in a variety of sizes and can be stored flat and easily set up when it is ready to be used. When set up, it is very durable and light weight. Its special kind of cardboard

Paperboard

Paperboard is a thick paper based material. While there is no rigid differentiation between paper and paperboard, paperboard is generally thicker than paper. According to ISO standards, paperboard is a paper with a basis weight above 224 g/m2, but there are exceptions. Paperboard can be single...

 can stand up to large amounts of grease or other liquid toppings. Its use is good for carry-out duties because it has a hook and a slot on its top flaps and it can be flipped upside down without spilling its contents.