I threw a few teaspoons of this into my Hario filter-in cold-brew bottle on Sunday, put it in the fridge, and forgot about it until last night (Wednesday). The flavor hadn’t gone off and the tea wasn’t bitter at all. It had such lovely light butterscotch and coconut notes. I drank the entire 750 ml with dinner. :P It was really yummy. I might cold-steep black teas more often.