» "Paintbrush" redirects here. For other uses, see Paintbrush (disambiguation). "Bottle brush" redirects here. For the tree, see Callistemon. The term brush refers to devices with bristles, wire or other filaments, used for cleaning, grooming hair, make up making painting, deburring and other kinds of surface finishing, and for many other purposes. Configurations include twisted-in wire (for example the brushes used to clean baby feeding bottles), cylinders, and disks (with bristles spread in o… (More on Brush)