[AnonNo15]

I wonder what are the mechanical properties of the case material (aluminium foam filled with plastic). This seems like entirely new class of composites.

[jacquesm]

This one is super coarse, there are much finer ones:

https://en.wikipedia.org/wiki/Metallic_microlattice

I've played around a bit with such super light metals and aerogels as well, they are very interesting materials with surprising properties.