Waterbrushes are innovative painting tools that are portable, convenient, and easy to use! Simply fill the waterbrush with water, squeeze to moisten the tip, and squeeze to dispense more water as you paint. This reservoir fill system can eliminate the need for a free-standing cup of water, which can be a hassle when painting on the go. This Mini Medium waterbrush has the same tip size as the Medium waterbrush, and a slightly smaller reservoir. One fully loaded reservoir holds 5.5 ml of water, which is just enough for smaller projects.