From the creators:
The EXOvault case is machined from solid metal stock in two pieces. Providing you with a distinctive beautiful handcrafted object that sets itself apart from the average modern plastic world. You have the choice of light aluminum, classic brass and aerospace grade titanium.
All the materials will age and patina beautifully through use.
Aluminum and brass are $95, or you can be an idiot and pay $300 for titanium.