Steampunk flash drive, A modified Pentode tube / Valve, with the insides now being a 64Gb USB 3 flash drive.
Handmade in copper with a steampunk feel. Nicely presented in a wooden box and excellent for christmas.
Some of the valves you see in these old electronics shops you could fit a raspberry PI in them.
Over in Lincoln, they have a big steampunk gathering, and to find out more, check out their page.