Drinking bottled water or juice between alcoholic drinks will reduce your BAC
Drinking water does help with alcoholic drinks, it allowed your body to detoxify the blood and prevent dehydration.
Drinking non-alcoholic drinks between alcoholic ones is a good strategy when you are out drinking. This is because spacing out your drinks will reduce your BAC. BAC, however, also depends on several factors, such as your gender, weight, metabolism, time period over which the alcohol was consumed and the amount of food in your stomach. Moreover, drinking water does not protect your liver from damage.