Drink the Leaf offers the best Pu-erh loose leaf teas available online. Pu-erh (also known as Pu-Er, Puerh), comes from Yunnan, China (Southwest China) and is ancient, rare and mysterious. Pu-erh, is initially produced into either green or black tea; then it is pile-fermented with controlled moisture and temperature levels, and finally, finished with aging. The leaves are either pressed into dense cakes of various sizes and shapes or left loose. This tea has an earthy aroma and a rich, mellow taste. Low to moderate caffeine level.