score:8
Eric Peet, on page 117 of The Rhind Mathematical Papyrus offers what may be your explanation:
So it would appear that des should describe the unit of liquid volume which would fill a des-jug, and that unit is unique (or at least originally referred to) to an item of the particular design of the des-jug.
Upvote:1
A des-jug is indeed a unit of measurement. A des jug of beer is roughly 7/8 pint (or 414ml).
Information is from https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/mathematics-ancient-egypt