The best anal sex you will ever have. Tantalizingly taboo, anal sex has never felt better than with the Back Door Zolo Cup. This will be the best anal sex you ever have. Tightly ribbed texture that mimics the sensations of anal sex. The Back Door Zolo Cup is ergonomically shaped to provide the necessary grip for the ultimate pleasure. Control the tightness of the inner textured channel by adjusting suction simply with your finger.