Super-Stretchable Teat section has an "accordion-like" portion that enables it to stretch in response to the peristaltic movement of the babys tongue. Ultra-Soft Silicone The nipples surface is very soft, yet it does not collapse easily. Made from thick ultra-soft silicone material, the nipple has similar elasticity to that of a mothers actual breast. The dome-like shape makes babys mouth open naturally, supports its mouth softly and fits its lips gently.
