Sign post geocache

Spotting a new spot i needed a new type of geocache to fill it

this design immediately got stuck in my head, once i looked over the area.

its designed to fit inside a standard British council sign pole, the outside diameter of the lid is 76mm and the inside tube is 65mm

inside there is a recessed cavity for the log and small swappables, there is also slopped supports for the ceiling - these double up as ramps so that if its being difficult to get something out you can simply invert it