In its infancy, blow molding was used primarily for the production of plastic bottles for packaging detergents and bleaches. The process was more art than science. Now a highly developed technology, it can produce parts which either cannot be made by another process, or be made as economically. Containers remain a major application.

In considering whether a part can be produced economically, or more economically, by blow molding, look at it first from the viewpoint of not having any openings. If what you visualize is basically hollow, request an evaluation from an experienced blow molder.