In DANDR, on page 230, Dr Atkins says: "You must drink at least eight 8 ounce classes of pure water daily. This can be filtered, mineral or spring water (not seltzer0. You may also have unlimited amounts of herbal tea (without sugar), but these do not count toward your total of eight glasses."

As far as I know.....water must be just that: water...to count as water.

Marlaine