You say you are allergic to tea- I assume you mean regular black tea. Well that still leaves a whole
world of other interesting "teas" to try out- health/herb teas, mint, chai, perhaps green teas, fruit or flower teas, spice teas, many dozens of different flavored "teas" that are not black tea at all. You can't be allergic to all those- that would be like saying you're allergic to "plants". Experiment and find some healthy tisane that appeals to you, and starts drinking it, either hot, or iced by the half gallon pitcher. Perhaps buy a variety box of herbal teas to try. They have some wonderful gourmet variety boxes of themn at health food stores. Don't expect or seek to find anything that tastes like Diet Coke. You'd have to think new, different.
And remember that one must cut down on caffeine gradually or else get major painful headaches.
...Just some stuff to consider if you ever want to get away from the Diet Coke....
