What to do with
Polystyrene is a type of plastic which is not commonly recycled.
Most people readily recognise expanded polystyrene which is sometimes used for take-away food containers and to package white goods like microwaves. Expanded polystyrene should be placed in the waste bin.
Polystyrene is also sometimes used for other food packaging like multi-pack yoghurts. Some local authorities accept it in recycling collections although it is unlikely to actually be recycled. You can check with your council if they accept it.