(PVC) Polyvinylchloride
(PETE) Polyethylene Terephythalate
(PETG) Polyethylene Terephythalate Glycol
(RPETE)Polyethylene Terephythalate

A clamshell totally surrounds the product in a two-sided enclosure. There are two basic types of clamshell designs: reusable or reclosable and permanently sealed. A reusable clamshell-- as the name implies, is designed to be reopened and closed many times and typically is used for long term storage of the product. It is normally hinged and the two parts of the shell are joined by tacking, welding, labels, or tape. A lightweight, un-coated card insert or a pressure-sensitive label is often used to present product information and graphics. Tooling can be more complicated and expensive, because of the type of mold and the close tolerances-- for friction seals, etc.-- that are usually involved.
(PP) Polypropylene
(HIPS) High-impact polystyrene
(HDPE) High-density polyethylene