As an action, you can splash the contents of this vial onto a creature within 5 feet of you or throw the vial up to 20 feet, shattering it on impact. In either case, make a ranged attack against a creature or object, treating the acid as an improvised weapon. On a hit, the target is covered with corrosive sap and takes 5 acid damage at the start of each of its turns. Dousing the target with water reduces the acid damage by 1 point per pint or flask of water used.