Another question is, does coffee dry out your "voice", your vocal folds? Research supposedly shows that it can. Should you avoid coffee? It depends. You can ask your doctor or you can read about it and hope that your sources are trustworthy. The more important question is are you well-hydrated?
A little not-so-nice advice I have heard is: "Pee Clear, sing clear". Maybe it is nice, if ...it is true. Another piece of advice I have heard is that if you have coffee, follow it with an equal amount of water. How much water in a day? Some say to work up to 8-10 [8 oz.] glasses of water per day. Some say 6 glasses. You have to get to know yourself. Each person is individual and has individual needs and also those vary from day to day.
What about tea and honey? Those go into your stomach and do not touch your vocal folds unless you are choking on the tea and honey. It could perhaps have a placebo effect or feel soothing to pharyngeal tissue, possibly, but your "voice" does not receive it, except for whatever makes it to the "voice" via the bloodstream.
You can read all kinds of opinions and even lies about these things, but I would advise you to talk to someone who actually knows anatomy and body function, such as a doctor or an ENT. I won't call myself an authority on these things but I will say that what I have read has come from authorities on these things.
