HORNS
Staying in the same mindset as with the pelts, we also collect the horns of sheeps (that otherwise would go to waste) and process them to turn them into drinking vessels, coating the inside with beeswax, the way it was done in days of yore.
However, despite some rare finds, archaeology hasn't proven that drinking hors were as popular as they are today in medieval pop culture. The ordinary drinking vessel was earthware, but glass was also largely used for this purpose, even though it was much more expensive.