Scuttle-butt

[S]o they continue to fire as directed, until they are either sent down to the cock-pit themselves, or have a momentary respite from their exertions, when, choaked with smoke and gunpowder, they go aft to the scuttle-butt, to remove their parching thirst.

Source: wiktionary

In this way, with an occasional break by relieving the wheel, heaving the log, and going to the scuttle-butt for a drink of water, the longest watch was passed away; […]

Source: wiktionary

The scuttle-butt is a goodly, round, painted cask, standing on end, and with its upper head removed, showing a narrow circular shelf within, where rest a number of tin cups for the accommodation of drinkers. Central, within the scuttle-butt itself, stands an iron pump, which, connecting with the immense water-tanks in the hold, furnishes an unfailing supply of the much-admired Pale Ale, first brewed in the brooks of the Garden of Eden, and stamped with the brand of our old father Adam, who never knew what wine was.

Source: wiktionary

It was the middle-watch: a fair moonlight; the seamen were standing in a cordon, extending from one of the fresh-water butts in the waist, to the scuttle-butt near the taffrail. In this manner, they passed the buckets to fill the scuttle-butt.

Source: wiktionary