It's possible you might be referring to one of these:
* OPP: Oriented polypropylene is a clear, strong, and stiff plastic often used for packaging and labels. It is commonly identified by the number "5" in the recycling symbol.
* PS: Polystyrene is a lightweight and versatile plastic, commonly used for food containers, cups, and packaging. It is identified by the number "6" in the recycling symbol.
* OPET: Oriented polyethylene terephthalate is a type of polyester that is similar to PET, but it has been stretched in one or more directions to improve its strength and clarity. It is often used for packaging and films.
If you can provide more context or details about where you encountered the term "OPS," I might be able to give you a more specific answer.
