In fact, steer clear of real tea (black, green or white)
and coffee and any herbs that are known to be diuretics, because these will draw water away from the colon. You need water going into the colon if you're constipated. Especially when you have used your fiber the way you're supposed to. If you can tolerate a mild herbal tea that is NOT diuretic, that's fine, too. Plain hot water is actually good enough, though, over all and is just water, which we need anyway.