I have used the term vocal folds instead of vocal cords in other threads on this topic. At the University of Pittsburgh Voice Center site which I linked to in other threads, it shows pictures of "Normal Vocal Cords", with this caption - Click Here"Normal Vocal Cords Here is a sequence of the vocal cords during voice production (adduction) phases of vocal fold vibration."
On the FAQ of the Voice Center site, there is this question and answer:"I have heard that drinking water is good for my voice, is this true? And how much?

Yes. The vocal cords (also called folds) vibrate against each other 100-400 times per second and require constant lubrication. Drinking 6-8 glasses of water and avoiding caffeinated drinks(cola,tea and coffee) is recommended for the "vocal lubrication."

Here is an interesting site on vocal anatomy, using both terms, "cords" and "folds". Singing Voice: Vocal Anatomy

It was strange for me to read what I had written here back in 1998. I stop in here with little time to write, and I can see that back then, too, I was typing down choppy thoughts and submitting without time to proofread. Ah, well. Time to get to work.

Alice