I love Iced Tea. Unfortunately I'm really supposed to only drink decaf due to the rhythm problem I have with my heart. Everything I drank up till the time I had the diverticulitis diagnosis was decaf except my morning coffee. then one ten ounce mug with one top off at the half way mark and that was it. I LOVE regular coffee. But like I said, with the new diets caffeine is a no no so I obey.
Decaf herb teas, iced tea, coffee, whatever. Anything is better than going through another attack of diverticulitis colic.
Plus you can drink it whenever you like, like you said!