The Full Goblet is a modest-sized, working-class tavern (public house), run by Hilgar. Hilgar is a bit over the hill and shabby, as is the general establishment. However, good solid fare at a decent value, and a regular and noisy clientele, keep the place in business, and the bar is also well-situated to bring in travellers.
The characters are given the task of transporting a flask of highly volatile liquid a long distance. The flask cannot be shaken too much or it will explode. The adventure involves stormy sea-voyages, bumpy cart rides through densely populated towns and horseback combat. In short there are many opportunities for it to break and explode.