Horn

On Earth in the distant past, Ian Chesterton found an animal skull with no horns or antlers, suggesting that it came from a horse (TV: An Unearthly Child) or deer. (PROSE: Doctor Who and an Unearthly Child)

The Judoon had horns. Removing the horn of a Judoon captain was considered a dishonour and therefore the worst of insults. (TV: Fugitive of the Judoon)

A horn could be used as a form of cup. In 1066 the First Doctor drank mead from a horn when visiting Northumbria. (TV: "The Watcher")