I really love this stuff. But I stopped bringing it to work. At work, all we have is a hot water dispenser that is set to who knows what. Every time I make this at work (even when I try to add cold water), it comes out bad, but when I make it at home where I am able to set my Zoujiroshi water dispenser thingamabob to 195 degrees, it always comes out good.
195 °F / 90 °C 3 min, 0 sec