In FRIENDS the one with the stain it looked like Rachel was drinking wine. Was she?

It may have been at the end but I really don't remember. She was
drinking some liquid in a wine glass that had come from what looked
like a wine bottle. Was she drinking wine? Because she was pregnant. I
realise you can drink if you want but she made a big deal about making
sure she didn't drink champagne at Monica and Chandlers wedding.