There are 4 Bottles:
1) As a Kid, in Kakariko Village - find the 7 Cuccos for the Cucco Lady.
2) As a Kid, enter Lon Lon Ranch from Hyrule Field - take the first door on the left and beat Talon's Cucco Game.
3) As a Kid, in Lake Hylia by the tunnel that leads to Zora's Domain - dive down to get Princess Ruto's Letter (you'll need the Silver Scale to get it).
4) As an Adult, find the 10 Big Poes in Hyrule Field - ride Epona and when a Poe appears, hit it with 2 Arrows to destroy it, then get off Epona, approach the yellow flame and put it in a Bottle; take the Big Poes to the guy in that room before you enter Hyrule Castle's Market.
Added by: sheiny Aug 2nd 2006, ID#6453