Battle Pet Bandage

Battle Pet Bandages are used to revive and heal all of your battle pets to 100% health, as part of the Pet Battle System. They are intended to fill the gap while Revive Battle Pets is on cooldown.

Source
Contained in:
 * Brawler's Pet Supplies
 * Darkmoon Pet Supplies
 * Fabled Pandaren Pet Supplies
 * Pandaren Spirit Pet Supplies
 * Sack of Pet Supplies

They are also sold by Master Li on the Timeless Isle for 1 Celestial Coin.