De-caffeinated anything is no-go -- there's still too much caffeine in de-caffeinated coffee OR tea. And miso is way too high in sodium (he's been on a low sodium diet since before his heart surgery).
But...I may have found an herbal tea that's flavorful and robust enough (at least he'll give it a try) and a friend offered a sample of a coffee substitute available at health food stores that is roasted grains and chickory -- so that might be acceptable. We'll find out. I'll investigate the Bancha twig tea, though, too.
I really need to transfer the date of Tom's next procedure in Boston to my calendar -- and post it here, too.
Didn't get as much accomplished today as I had on my list.