Sera’s Missing Cat
The first bottle is given to you by Sera, when you return her cat. The bottle is half-filled with Milk.
Lantern Oil for Sale
The second bottle is given to you by Coro, the lantern salesman. He’ll give you the bottle if you buy a replacement bottle of oil for 100 rupees.
Hena’s Fishing Hole
The third bottle is found off a small bridge near Hena’s fishing hole. You’ll need to bobber fish on the west side of the bridge and reel the bottle in.
Breaking Jovani’s Curse
The final bottle is given to you by Jovani, the guy looking for the Poe Souls. After 20 souls, he’ll give you a bottle filled with Fairy Tears.