Can somebody tell me the location of the 4 bottles?

There are four bottles you can get in almost any order.
1) The first one you get after you return Sera's cat.

2) Coro (the guy that gives you the lantern) will sell you a bottle (with oil in it) for 100 rupees.

3) The third is in the fishing hole. Use your inventory Fishing Rod and do bobber fishing in the west pond. Let your lure sink, then with some luck you will pull up the bottle. If you don't get it the first time, just try again.

4) After you collect 20 Poe Souls, go back to Jovani's house in Castle Town. He will give you a bottle full of Fairy Tears.

1. When you get a fish and return Sera's cat.

2. When you give 100 rupees to Coro the lantern salesman you get a bottle with lantern oil in.

3. In the fishing hole you can find one by fishing.

4. When you give Jovani 20 poe souls you get one filled with fairy tears which fill all your energy and double your attack power.
Hope this helps.