When the coffee is superb and correctly brewed, it should continue to taste wonderful (and sometimes even improve) as it cools. Bad coffee, on the other hand, tends to taste even worse. Some of that stink can be hidden by scalding hot brews, which may explain why many people love their coffee to a tongue-searing degree.

We’d like to offer a couple of our personal favorites. Most modern drip coffee machines have replaced the old-fashioned glass-on-a-hotplate with superior vacuum-insulated carafes—this benefit is available to those who brew manually as well!

Reference link: https://www.yesplz.coffee/keeping-it-hot/