This heavy cloth sack always weighs ½ pound, no matter how many berries it holds. Each dawn, the bag refills itself with up to 20 Goodberries, which can be drawn one at a time. Once 20 berries have been removed, the bag produces no more until the next dawn.
The berries within are twisted mockeries of true Goodberries, withered, sour, and foul-smelling. Before a creature can eat one, it must succeed on a DC 14 Wisdom saving throw. On a failed save, the creature cannot bring itself to consume the berry due to overwhelming disgust.
If eaten, the berry deals 1 poison damage. The creature must then succeed on a DC 14 Constitution saving throw or immediately vomit the berry, negating its effect. On a successful save, the berry provides nourishment sufficient to sustain the creature for one day.