The Able Juice is an item from Super Mario RPG: Legend of the Seven Stars.
When used, it will restore any abnormal conditions (Fear, Silence, Mushroom, Scarecrow, Sleep, Poison) during battle. It isn't so rare. It is found in the shop at the Mushroom Kingdom. It is very rarely found in ? Blocks and as rewards. It appears as a blue mug with a straw and a little star.