In operation for more than 30 years, Portola Packaging designs, manufactures, and markets a range of tamper-evident plastic closures, bottles and equipment for the beverage and food industries. It specializes in tooling components, such as molds and blow molding equipment for the dairy industry. The company provides a range of services, including labeling, assembly and decoration services. In addition, Portola Packaging manufactures a variety of high-density polyethylene bottles to customers throughout Canada. It also offers cap application, conveyance and feeding systems. The company installs cable conveyors, leak detectors, grinders, scrap handling systems and silos. Portola Packaging offers hot stamping, silk screening and pad printing services. It maintains one of its locations in San Jose, Calif.