• 01.036 to the cellar to fill a pint beer-mug,

Given that Hobbits are much smaller than adult men and women, I am amused that their beer-mugs are larger than a standard bottle of beer in my experience.

This is a two-word word in its OED headword, but hyphenated in some of the examples.

“beer, n.1.” OED Online. Oxford University Press, June 2017. Web. 5 September 2017.