Size Matters Max-Twist Nipple SuckersSize Matters Max Twist Nipple Suckers These simple and powerful nipple suckers deliver consistent, strong suction for focused stimulation. To use, place the base firmly against the nipple to create a seal, then twist the easy grip control cap to generate immediate suction. With the Max Twist design, you can start with a light sucking sensation and twist further to create a more intense vacuum. When you're ready to release, simply turn the cap backward