Do you know the story of the three billy goats Gruff?
Once upon a time there were three billy goats, who were to go up to the hillside to make themselves fat, and the name of all three was "Gruff." On the way up was a bridge over a cascading stream they had to cross; and under the bridge lived a great ugly troll , with eyes as big as saucers, and a nose as long as a poker.
This cache is hidden in a small clear 145mL container with a blue lid. FTF gets the troll inside. Will be regularly replaced for future visitors, Maybe you will be lucky enough to find one.