The tourist literature for the area claims Callan as the largest town in Kilkenny. That may give you pause for thought until you realise that the conurbation 12 kilometres up the road is the CITY of Kilkenny. So indeed Callan is the largest TOWN!
Anyway, the cache! Unfortunately the original magnetic bolt was muggled. You are now looking for a 180 ml sized container.
The hint is a spoiler: having drawn you here I don't want you to leave without a find.
Congratulations to GreenBug and Lulybelle on being joint First to Find a week after the caches were published. They did so on their way from Cork to The New Years Resolution Event in Cooley Co Louth. Apologies that the initial hint lead then astray initially: all corrected now, thanks. The exceptional snowfall in the Callan area in particular kept many Cachers indoors for a few days after publication.