Fermented Spider Eye

The Fermented Spider Eye was first added in the 1.9 Pre-Release 2. It can be crafted from a spider eye, brown mushroom, and sugar on a crafting grid (unsorted). They currently do not have a use and cannot be eaten unlike the regular spider eye. They are used in a brewing stand to make Weakness potions, however, in the 1.9 prerelease 3.