Potion of Animal Friendship

From Dungeon Master's Guide, page 187. Found on Magic Item Table B.

Description
''Potion, uncommon. 0.5 lbs.''

When you drink this potion, you can cast the Animal Friendship spell (save DC 13) for 1 hour at will. Agitating this muddy liquid brings little bits into view: a fish scale, a hummingbird tongue, a cat claw, or a squirrel hair.