It will lose a bit of flavor, that's a given...but it's not too bad if you don't add too much water. Yeah try it in a smaller batch first but remember the ratio. So if you took 10ml of Boba's from a 30ml bottle and added 3 drops of distilled water, you would need approximately 9 drops for a full 30ml bottle. That's just an example, it will likely require more water. Try it out!