The button designed to integrated with the handle. There will be no leaks and bubbles around the button when used.Scraper on backside of Scrub easily removes baked-on food including non-stick and cast iron cookware, pots, pans, dishes, Range hood and glassware. EASY TO USE: A simple push of a button dispenses dish soap through the brush head using air displacement. Push the buckle of Brush head Lock and unlocks for easy removal and replacement. The fixed sponge is a Velcro, which is very convenient to replace the sponge brush. COMFORTABLE GRIP: The ergonomic non-slip handle fits comfortably in the hand even when wet and soapy. The handle doubles as a soap resovoir, which is easily fillable with any dish soap like bottle fillable DURABLE DESIGN: The BPA-free all-plastic construction ensures durability and long-lasting use while the soft nylon bristles resist deformation during tough scrubbing, Easy to clean and dishwasher safe; Delivery Quantity: 1PC Product color: grey Product size: handle: 24.3CM: brush head 9.3CM*6CM