Bottle 1 - Destroy the chain which holds the boat (you can shoot as Marty or any other character using a long gun), then jump in and get the bottle on the right. Jump up to get it.  Bottle 2 - Before fighting Barbossa you need to find three parrots and shoot at them. The first one is at the beginning of the level on the right (near the bridges). The second one is next to the cannon which you use to shoot the steel pillars. The third one is near the place where you direct the ray of light at the golden skull. 
Bottle 3 - In the place where you found the winch used to move the bridge switch into a character with a long ranged weapon (Marty) and shoot at the target high on the left. A platform will fall down to water - get on it as the female character and perform a double jump.  Bottle 4-10 - While fighting Barbossa you need to defeat three waves of enemies (striking three hits) and change to Siren. You can leave the main arena using two paths - destroying blue crystals between the rocks on the left and on the right. 
Bottle 4 - Go to the secret cave and switch into cursed Jack (he is the Sea Walker). Look for the treasure - the golden mask and take it to the statue on the left.  Bottle 5 - Leave the cave and look for the golden dog. When you find it switch into the female character and jump to the given place. 
Bottle 6 - In the same cave there is a minigame kit on the right. You need to match the colors of the skulls with the colors of the particular elements.  From the secret cave you can get to the secret bay - by leaving the cave which is on the left from the underwater statue. 
Bottle 7 - In the secret bay (check the description of bottles number 4-6) as the Sea Walker get to the indicated object. Pull the bar as the strong character (Bo'Sun).  Bottle 8 - In the same bay go at the shore on the right and use Blackbeard's power on the chest. Create the cannon and shoot at the yellow ducks. 
Bottle 9 - In the secret bay climb the ship and slide down on the chain from the right mast.  Bottle 10 - From the main arena use the right underground passage. You will get to another cave with a small island. The character you meet there will ask for the spyglass. You will find it in the second secret cave.