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Materials used to manufacture food storage containers are as follows Clear (Polycarbonate), Translucent (Polypropylene) & White (Polyethylene).

This number will be between 1 and 7 and will be stamped inside a triangle of arrows. As a general rule, the numbers that are safe for use with food are 1, 2, 4, and 5. The best type of plastic for use in long-term food storage is high-density polyethylene (HDPE), which is indicated by the "2" symbol.

Polycarbonate is a type of plastic that is clear, lightweight, heat resistant, and shatter resistant a significant safety advantage. This unique combination of attributes makes polycarbonate a great material for a wide variety of applications, many of them involving direct contact with foods and beverages.

Food storage containers come in one of two shapes round or square, with each shape having its own set of benefits and limitations. While round food storage containers promote proper air circulation around the container and faster cooling times, square food storage containers maximize storage space.

Food Grade Food Storage Buckets. There is a lot of misinformation out there about plastic buckets. Most of the controversy rages over whether a bucket is food grade or not. Most plastic containers, usually on the bottom, will have a number inside a small triangle. The #2 means it is made from HDPE plastic.

Many food grade plastic containers fall into the high density polyethylene or HDPE category. It has excellent chemical resistant properties making it suitable for a wide range of foods and other products. For example, most juice or milk containers and five gallon food buckets are made from HDPE.