The Derwent Waterbrush Multipack of 3 features an essential selection of fine, medium, and innovative chisel tip brushes designed for seamless en plein air painting. The leak-proof barrels house a built-in reservoir with a non-drip valve, completely replacing the need for messy water cups on the go. It provides travel sketchers and hobbyists with a highly portable, easy-to-clean toolset perfect for blending water-soluble pencils or watercolor pans.