The absolute best bottle brush for ferret water bottles (especially the Lixit wide mouth models) is made by Lixit, and can be found at the Ferret Store (item # LX-690) for $6.59: http://www.ferretstore.com/items/lixitmain.html We went through at least a dozen brushes over five years trying to find a brush that worked on water bottles before finding this little gem. Leonard Bottleman [log in to unmask] http://www.cascade-ferret.org http://www.teleport.com/~leonard [Posted in FML issue 2965]