Our chashaku is handmade out of 100% bamboo and is used in traditional Japanese tea ceremony to portion matcha. Unlike a metal spoon, a bamboo spoon does not charge itself statically, helping the matcha powder to slide off easily. Wipe it with a clean dry towel after each use. One bamboo spoon is about 1/3-1/2 of a teaspoon - so a normal serving size would be 2-3 bamboo scoops.