Ideal for school use and beginning painters. Aqua-Flo Watercolor Brushes by Royal & Langnickel are a set of convenient, portable watercolor brush available inexpensively: includes small, medium, and large brush heads made of soft synthetic Taklon. Unscrew barrel portion in order to fill the lower half with water, gently squeeze barrel with the tip pointing down to release liquid. Removable caps protect the bristles and prevent leaking while not in use.