Two (2) River Rock Geocaching Containers By Weebledogs Geocache In Plain Sight River Rock Geocaches Can Be Placed Anywhere Making Them A 4 Star Difficulty Cache Color Log Sheet For Each Container 1 3/4 Inch Plastic Centrifuge With Neodydium Magnet "fused" Into Lid Corresponding Magnets On Rocks Give A Firm Seal And This Design Will Lost Many Seasons!