I have done this in the past - I just drink Camomile tea now and fruit teas, minus the Caffeine. Camomile is a relaxant too which is handy for the anxiety.. but I am drinking that much during the day/through the night that I am getting lots of water inside me too, keeping me hydrated.
Fizzy sugary things are really bad for you and can leave you caffeine dependent also! Plus if you are struggling with weight, it keeps the weight on.
If you find fruit teas boring, you can add a little honey
