Slip trailing is a very popular surface decorating technique among ceramics artists. Many potters and handbuilders use slips to add both color and texture to their pots. Slip trailing is the application of slip, which is clay mixed with water, to a clay surface using a bottle or other flexible vessel with a pointed tip. Unlike applying slip with brushwork, slip trailing involves a thicker, more fluid application, which can be used to created beautiful lines and raised textures. Trailing is not limited to slip, however, and can also be accomplished with underglazes, glazes, wax resist, etc.