Pu-erh tea

„This process was first developed in 1972 by Menghai Tea Factory and Kunming Tea Factory] to imitate the flavor and colour of aged raw pu-erh, and was an adaptation of wet storage techniques being used by merchants to falsify the age of their teas. Mass production of ripened pu'er began in 1975. It can be consumed without further aging, though it can also be stored to "air out" some of the less savoury flavors and aromas acquired during fermentation.“

„In some ways, by doing so you’re basically cupping the tea without cupping it – you’re testing whether or not the tea is good for your style of brewing. Even then, however, a good tea drinker should be adjusting to the tea and trying to brew it as best s/he can, which means that the first try can come out horribly wrong.“