Minecraft wiki entry for Things_not_to_do, associated text: These base potions (awkward, mundane, thick potions) have no effects on the player. The player instead consumes nether wart and other potion ingredients, which are all valuable for brewing useful potions. Therefore, if they happen to have made them, the player should avoid drinking awkward, mundane, and thick potions altogether. Drinking the latter two, however, empties bottles for reuse.