A hollow coin could be used for many purposes; hiding things would be the first thing that springs to mind, but what? These are proper coins and therefore have a limited amount of space within. So with today’s technology it would be possible to hide a tiny camera, microphone or to keep something safe such a small memory card, the possibilities are limited but useful.
Product Features
•Actual coins are precision hand milled to create a secret compartment inside
•Half dollar has enough room for a micro SD card (not included)
•Store secret microfilm or tiny notes
•Included “unlocking ring” allows coins to be opened
•Indistinguishable from regular coins when closed
Prices start at $20.99 to $24.99
Source [Think Geek]
