It adds flavour to water, it's a liquid and you put in as much or as little as you want. I'm not a big juice drinker, sometimes apple or orange is a bit on the sour side for me. I need to find a nice blend between sweet and sour. I do like peach juice though. Sometimes I've had water and added lemon, lime or even cucumber to it (that's very refreshing). You can also add pineapple as well. Otherwise plain water can be bland if you have too much of it.