The Adiri® Nurser? Nipple is made of the highest Medical Grade Silicone, fine-tuned by advice from practitioners, scientists, lactation consultants, cutting edge designers, engineers and most important of all, moms. The shape and feel was resulted from what babies want most out of a nipple, the suppleness and softness of a mother"s breast. There is nothing more natural and important than a mother"s connection with her child, which is what Adiri® strives for with the Nurser? Nipple.