I'm hoping to get some more of this material to put in the top of the really-useful-boxes I store my models in.
What I have is pretty good at stopping models moving around, and the 'waves' give some flexibility if the models in the box are different heights.
I don't think it's "sound insulation foam" - that stuff looks similar but it's too expensive.
But is it "egg box foam", "dimple drying foam" or something else? And is there a good place to buy it as Ebay and Amazon seem stupidly expensive for the products on those keywords (if indeed they are the same stuff).