Polystyrene

Polystyrene is a kind of plastic that looks like foam. It is very lightweight, which makes it great for making things like cups and packing materials. For example, you can find polystyrene cups at almost any restaurant. It's also great for packing because it helps protect fragile items like dishes and electronics. Polystyrene is made from styrene, which is a natural gas, and it can be recycled.