The rounded cone shape of the massage lets you touch the right external places. Place the toy under a stream of luke warm or cold water and the premium borosilicate material will heat up or cool down for enhanced temperature play. This massager is shatterproof, non-porous, body safe and will give a life time of pleasure! Unique design. Use cold, warm water to cool it down, heat it up. Hand crafted and made of borosilicate glass Shatterproof. Body safe.