Now here is were terminology can get it the way - I didn't think there was any Styrofoam in any of the boxes. We've used Styrofoam for some insulation products, but don't consider the pink stuff the same thing. Maybe technically it's the same, I don't know, just never considered it to be.
BTW - I would not use what I consider "Styrofoam" for packing. Though it's probably the most common thing used to hold things stable inside boxes.
Now that I know this, I would not use it shipping something else to you LOL!!