The MAM Feel Good Bottle is made of temperature-resistant glass. As a result, the bottle can be heated in the microwave or bottle warmer, cooled down quickly, cleaned in the dishwasher, and sterilized at a high temperature. Easy to fill & clean and the bottle does not absorb smells or colors from food. Simple to use to make everyday baby life easier. Includes MAM's ultra soft nipple for an easy switch between breastfeeding and bottle. Bottles are manufactured without the use of BPA and BPS. Together with our MAM Med-Experts, we have developed a silicone nipple that makes switching between breastfeeding and bottle especially easy. Market research confirms that 94% of babies accept the MAM Nipple*. Thanks to its patented, silky soft surface drinking from a bottle feels completely familiar (* Market research 2008-2023, tested with 1,808 babies). The 9 oz. bottle comes with our medium flow nipple for ages 2+ months. PREMIUM GLASS: Made from high-quality, temperature resistant glass, the baby bottle can be heated, cleaned in the dishwasher and sterilized at high temperatures. DUST CAP: The spill-proof baby feeding dust cap protects the bottle from dirt and works as a measuring cup for even the smallest amounts, thanks to its integrated scale. BREASTFEEDING FREINDLY, An Elongated silicone nipple, designed like a breast nipple, facilitates an easy transition between breastfeeding and bottle feeding, supporting mother-baby bonding. BPS/BPA FREE BOTTLE: All MAM Feel Good bottles are 100 Percent BPA and BPS Free making them ideal for baby feeding, peace of mind for parents and an ideal start in life for babies.