This substance, the byproduct of a process
which produces a popular beverage, is itself inedible.

It has no usefulness
whatsoever to a player, but those with low intelligence should be
discouraged from carrying it around for a while just in case. If Grounds
of Coffee are allowed to lie undisturbed for one week, they will lose their
internal moisture and develop a green mold which is equally harmless
but much more disgusting than the Grounds themselves. Anyone encountering
moldy grounds must save vs. nausea (roll Constitution or
lower) or become violently sick for 1-4 turns.