Normally sold in sheet form and cut to thickness and size required. No standard is held as a stock item. Sheets and containers can be supplied in any shape, but this requires a special mould to be made for a specific shape. It is available in container shapes with lids and this is often used in the fresh food industry. An example would be for fish and these are known as “fishtainers “, which come in various sizes. The 20 kilogram size container is one of the most popular containers in common use.