Hidden Memory Rings
Playing with jewellery ideas, I decided I wanted to be able to secrete away something special. Heavily inspired by masynmachien's layered acrylic rings* in form, I came up with a modern take on the Victorian obsession with locks of hair, and a ring for carrying a hidden micro-SD memory card.
I used poplar plywood and mahogany veneer for these rings, but there's no reason why you couldn't use acrylic for your versions, or even mix-and-match layers of both acrylic and wood.
So, on to the Hidden Memory Rings...
The construction details are here: http://www.instructables.com/id/Hidden-Memory-Rings/