You know it as EPS - Expanded Polystyrene. Or Styropor®. Or another name - there are many around in Europe.
But why give a new name to a 60-year-old, internationally established material like EPS? Simple: because the name airpop immediately brings to mind what the material is made of - It's air. A lot of air. 98% air, to be precise.
And just a tiny fraction is made of synthetic material, which expands to 50 times its own volume. To protect everything that needs to be protected: our children's heads, TVs, fresh fish and thousands of other things.