What an interesting object and with so many possible hiding places. The container you seek is a small metal tin, but it is not hidden in any of the obvious spaces within the cheese itself.
This location is popular with muggles that sometimes leave trash and other objects among the rocks, so do not be fooled by what you might see.
Since there are many possible hiding places to search, you may wish to read the hint.
Don't for get to CITO (Cache In Trash Out)
Abegu Rnfg bs gur ovt Purrfr ol n srj srrg - ybbx sbe na byq gver pnepnff va gur ebpxf