Closer to Nature's award-winning range of BPA and phthalate free baby bottles are designed to promote content and easy bottle times for parents and baby. With Closer to Nature Bottles, switching between breast and bottle feeding becomes easier than ever before. Developed with breastfeeding experts to mimic the breasts and nipples natural flex, stretch and movement. Closer to Nature's 9 oz. bottle is a natural choice when selecting a bottle. The soft silicone nipple feels like skin, and gently elongates and pulses during feeding to mimic natural breastfeeding action. The shape of the bottle, and the slow flow nipple with a super sensitive valve eliminates excessive air flow, so little ones ingest more milk or formula, and less air. The compact shape of Closer to Nature bottles allows baby to take a bottle in a natural position and to be closer to Mom or Dad. The easy hold bottle is marked in millimeters and ounces and has a hygiene seal cap to keep germs out and drips in. Closer to Nature bottles and nipples are easy to clean and fill. They are microwave and dishwasher safe, yet light and easy to hold. 9oz size is perfect as baby grows and requires larger amounts. Soft silicone nipple feels like Mom. The breast shaped nipple makes it easy for baby to latch on. It has flex and stretch nipples to allow for natural movement. It elongates and pulses during bottle time to mimic breastfeeding, making it easy to switch from breast to bottle. Super Sensitive Easi-Vent valve eliminates excess air. Less air means Baby ingests more milk or formula to prevent colic and reduce discomfort. Compact and lightweight shape. The compact shape allows baby to take the bottle in a natural position and to be closer to Mom, like when breastfeeding. The lightweight bottle is easy to grasp and hold. For total reassurance, all of our products are always BPA and phthalate free.