This large (1.5 liter / 0.4 gal) water basin is a great choice for longer painting sessions. When you bring a bigger basin, you get to work for longer between water changes. Shaped like an accordion, the Collapsible Brush Basin expands from 3 cm (1.2") in height to 16 cm (6.2") when you pull the yellow handle. The basin measures 13 cm (5.1") in diameter.