With a light push of the soft, non-slip button, soap shoots out of the OXO palm brush and onto the item being scrubbed. Soap continues to squirt when the button is pressed, even when the reservoir is near empty. The brush head uses durable nylon bristles that easily clear away dirt and are safe for non-stick cookware.To fill, simply unscrew the cap and add soap to the reservoir. Then replace the cap for a tight seal. When you're done, stand the brush upright in the caddy, so the brush drains; it will keep your sink or counter much tidier. The brush features a soft, non-slip gripping surface and is contoured for optimal comfort and scrubbing power.