Design your own jewelry with Ponoko

Features the Solid State Depot logo and cryptic latitude/longitude for the hackerspace and are made from bamboo so they’re ultralight. Size is 25.4mm (1 inch) square. This small piece of laminated bamboo is tough enough to use on a keychain.

These aren't exactly cheap to cut since the entire face is laser-engraved and that takes time. They sell as donations to Solid State Depot for $5 and are available at the hackerspace in the products case.