Increasing nipple size and sensitivity has never been so easy! The Nipple Play Vacuum Twist Suckers stay where they are placed using suction. You decide how much suction you'd like to use, simply place the open end over the nipple and twist to create as much or as little suction as you desire. Featuring a double silicone washers on the inner plunger ensure these suckers will keep their suction throughout play time and a flanged base for comfort. After play is done, they can be easily disassembled for cleaning.