Well, here is a list of the four bottle locations of Ocarina of Time. I hope this will aid you in your quest!
Bottle #1 - Lon Lon Ranch
Bottle #2 - Kakariko Village
Bottle #3 - Lake Hylia
Bottle #4 - Hyrule Field
The first bottle is fairly easy to get. Upon enter Lon Lon Ranch, go through the door on the left of you. You should see Talon sleeping in a room full of Cuccos. To recieve the bottle of milk, you must play his Cucco Finding Game, which forces you to find his three "Super Cuccos" in the crowd of ordinary ones. The easiest way to do this is to throw the Cuccos running around (before you talk to Talon) into the section between the crates he's resting on and the stairs. They should be confided to that area for a time. Then, just talk to Talon, say "yes" to play his game, then go pick up the Cuccos in the room. Your reward is a bottle of milk.
The next bottle is recieved as a reward for helping the Cucco Lady get all seven of the stray Cuccos into the pen. The locations of them are as follows:
1. At the entrance of Kakariko Village.
2. On the raised platform opposite the fence beside the Skulltula House. (You will need to use another Cucco to reach this area.)
3. At the entrance of the Graveyard.
4. In the crate next to the stairs toward Death Mountain.
5. The section behind the fence next to the Witch's Hut. (Once again, you will need to use a Cucco to get to this area.
6. In the same fenced area as above, up the ladder.
7. In the section with the Potion Shop, closest to the entrance to Death Mountain.
This bottle is by far the easiest to get. All you have to do is dive down in Lake Hylia (you must have the Silver Scale) and grab it. This is part of the sequence used to get into Jabu-Jabu's Belly.
On the contrary to Bottle #3, this one is the most difficult to get, and many OoT players don't try to get this one. To recieve the last bottle, you must defeat and catch all 10 Poe Spirits across Hyrule Field, and give them to the guard in Hyrule Castle Market. The catch: They can only be caught while riding Epona. If you would like to see the locations of the Giant Poes, check out the Giant Poe Locations for your answers.