I've seen clients drinking it by adding to water (proportions done by taste preference). I've tried it and the brand had spearmint in it, so it was a minty, fresh drink (I added ice to it). Other brands aren't so tasty, so if you don't like the taste, you can play around with adding it to juices or smoothies.
Note: Careful, it STAINS! A minor inconvenience, liquid chlorophyll will turn everything...and I mean everything a nice green hue...including your teeth! The trick is to drink then brush your teeth right away.
Hope that helps.