PREMIUM BOROSILICATE GLASS: Manufactured in Europe from shatter resistant baby safe premium borosilicate glass that is scratch and stain resistant, that will not absorb stains or smells. ANTI-COLIC NIPPLE: Reduces gas & discomfort by letting air flow freely as your baby drinks, reducing bubbles so babies swallow less air and feed more comfortably at their own natural pace HIGH TEMPERATURE RESISTANCE: Safe for heating, dishwasher cleaning, and sterilizing at high temperatures. Thermal shock resistant so can be stored in the fridge or warmed. BREASTFEEDING FRIENDLY: Thoughtfully designed with medical professionals for even the tiniest babies, MAM bottles mimic mom’s nipple feel and shape making them ideal for preemies, newborns, and Combo Feeding routines. SKINSOFT BPA FREE SILICONE NIPPLE: through an elongated nipple that is pre compressed MAM achieves a 94% Nipple Acceptance, making it easier to switch between breastfeeding and baby bottle feeding GROWS WITH YOUR BABY: No need to switch or buy new bottles. These baby bottles work with all MAM Nipple sizes and flows, adapting as your baby grows. DURABLE AND SAFE: Rigorously tested to exceed American and European safety standards. MANUFACTURED IN EUROPE