Gotta be careful with the iced tea. In Texas, it always comes unsweetened. In other parts of the South, it's generally quite sweet (undrinkably sweet, to my tastes).

My beverage issue turned out to be orange juice. A couple years ago, my wife and I settled into a habit of having breakfast at a cafe that had some nice OJ. I'd have it nearly every day with breakfast. After a while, I realized I was having unpleasant reflux. I experimentally tried cutting out the OJ, and the problem completely went away. Now, I'll only have OJ on occasion, and I'm fine. My guess: the acid in the OJ was slowly eating away at the lining in my throat. Fun stuff. You can get "low acid" OJ in the supermarket, but it doesn't taste quite right and it's only available without pulp. *sigh*

When in doubt, there's always fizzy water (Perrier, San Pellegrino, etc.).