Tinytar

Wondrous item (socketable), common
  With the sentient tar of a tar elemental and a dose of enchantment magic, one can craft this friendly and amenable little helper. When applied to anything you can hold, the tinytar ensures you don’t accidentally drop it.
  Grippy. This small, magical phial contains an animate and excitable tar. When applied to the handle of a weapon, shield or other held item, the first creature to hold that item can’t be disarmed of the item against its will as the tinytar. The creature can still sheathe or drop the item if it desires; the tinytar is very intuitive. As an action you can hold the magical phial to the tinytar causing it to shlink back inside.