bebe vs bebes
When do I use bebe and when do I use bebes?
bebes is used when talking about second person in singular (you drink), bebe is used when talking about third person in singural (he, she drinks). this is mostly because in spanish they don't include "you" or "he/she" when speaking, basically you can use verb to understand whom about the statement or question is.
Further to what huliganz has said, there is a familiar (tu) and formal (usted) way of saying 'you'. Verbs always conjugate the same for el/ella & usted. So if you see bebes it means you drink (familiar); but if you see bebe, it could mean he, she or you (formal) drink.