Polystyrene scent in bedroom
New plastic off-gasses. Leave it in your car for a week, most of it will go away.   

None of it is good, and yes, food containers do leach into food.  

Polystyrene less than most, but you're not getting heavily processed polystyrene foam, which stopped off-gassing while it was still "sand" in the railcar, before it reached the foaming plant.  You are getting solid polystyrene like is used in model airplanes.