This latest version of nipple toy is suitable for breasts of all shapes and sizes. The top is made of soft silicone material. Simply press lightly on the silicone top and place the nipple suction cup on your nipple. Make sure there is no space between the areola and product，Let it sticks tightly to your nipples, stimulating your breasts and making them sensitive and comfortable, just like a real man sucking and licking your breasts.