These trays are thermoformed in a wide range of sizes from standard and eco-friendly materials and are custom designed to match production and packaging requirements. The open face trays can include special features such as symbols and engraved lettering or part numbers, undercuts and locating detents for nesting and stacking, compatible inserts, various types of snap-lids, and other customer specified characteristics. Capable of meeting design challenges presented by odd-shaped or distinctive devices and components, including custom cavities matched to the part, sealed packaging, and other requirements, the trays can be developed from a customer supplied part.