Rotational molding is a manufacturing process that involves the use of a heated mold to create a hollow part. This process is effective for producing both large and small parts. It can also produce parts with multiple cavities. Common applications for rotational molding include containers and automotive parts. It can produce anything from a small toy part to a large tank that holds thousands of gallons. And because it can be used to create parts with many different characteristics, it can also be used to produce components with very tight tolerances.