Find all five bottles by searching the following locations and performing the corresponding tasks:
HOW TO UNLOCK
Bottle #1 in Kakariko Village
Purchased from Street Merchant for 100 Rupees.
Bottle #2 in East of Link's House
Note: Flippers are required. There is a bridge East of Link's House or Ravio's Shop. From where the House of Gales is located, Link can swim to the north and will eventually read the area underneath the bridge. The Bird Lover will give Link the bottle.
Bottle #3 in Death Mountain (Hyrule)
Note: The Flippers and Hookshot are required. Head east of the House of Gales within Lake Hylia to find a bottle with a message in it. A man has become stranded on Death Mountain and asks for Premium Milk from the Milk Bar in Kakariko Village]]. Inside the Milk Bar, Link can speak with the owner in order to receive a bottle filled with Premium Milk. Go to the area just outside of the Tower of Hera and head eastward. There is a bridge that can be crossed using the Hookshot. Continue eastward and enter the cave that has a sign leading to Rosso's Ore Mine. Carefully drop down the moving platforms until you reach the big central platform within this lava cave. There are three walls on each of the sides of this platform. Merge along the wall to the south and wait for the moving platform to appear. Follow this platform until you come to a formation of three platforms at once. Use the moving platform on the far left and ride it until you reach a point where you can exit the cave. Once outside, merge along the wall to reach the man to the right. Give him the Premium Milk and he will drink it. He'll thank you and let you keep the empty bottle.
Bottle #4 in Vacant House
Note: Bombs are required. The Vacant House can be found in the central part of Lorule, just south of Lorule Castle. It corresponds to Link's House or Ravio's Shop in Hyrule. Set a bomb along the northern wall, just outside the house to break open a hole. Walk inside to find a bottle inside the treasure chest.
Bottle #5 in Great Fairy Pond
Northwest of the Bombflower Shop in Lorule is found a large cracked boulder. Blow it up using a bomb flower to find the Great Fairy Pond. Donate a total of 3000 rupees to earn the bottle.