Geocaching Placard - In Case of Emergency - Put cache ID or coords on placard. If something goes wrong, you can be located. Smart! Vehicles Placard, Good Ideas, Geocaching Printable, Cars Placard, Geocaching Ideas, Cars Signs, Sensibl Ideas, Geocaching Placard Smart, Parks Permit
A variation on the pine cone #geocache, This would be easier than trying to get the container fit inside the cone.