Nano cache

Examples of Nano-Caches

A Blinker (and a dime, to show relative size)

A Bison Tube (and a dime, to show relative size)

A nano-cache is an extremely small micro-cache. A nano-cache is generally much smaller than a 35mm film canister, and has room for only a custom-fit log sheet. Examples include:

• smaller bison tubes
• blinkers
• contact lens cases
• memory card cases
• breath strip containers

There is no separate cache size for nano-caches at Geocaching.com. Since the definition of a micro-cache ("35mm film canister or smaller") describes a nano-cache, nano-caches should be listed as micro-caches. Still, some cache owners list nano-caches as an unknown size, and explain the nature of the container in the cache description.