The Pro-Blend dispenser makes mixing the Permanon much quicker and more accurate. Rotate the black top to adjust the orange disc to the desired measure. Squeeze the bottle filling the measuring cup to the orange disc. Stop squeezing, and the excess Permanon will drain back to the orange disc "preset" measurement. Finish by pouring the contents out through the small spout in the black lid. Due to the change in the new bottle thread type, we are including a clear bottle to complete the system. Just pour the Permanon from the new bottle into the clear one and your ready to go.