You can replace any C-Item with a Bottle using a glitch. Start by making sure that the item to be replaced is not equipped to a C-Button. Equip an empty Bottle to a C-Button, and swing it at a fish. Pause mid-swing, and swap the Bottle with an item you don't mind losing. Unpause. If you catch the fish, the item you swapped will become a Bottled Fish.
Saving will make this permanent. There is no way to undo this glitch.