The three main types of surfboard foam are Polyurethane (PU), Expanded Polystyrene (EPS) and Polystyrene (PS). No one foam is “better” than the other, rather they all have unique performance ...

Reusable plastic and melamine trays have been largely phased out of school cafeterias over the last decade, replaced with PS foam trays that end up in the trash — 225 million of them every year ...