MAM Anti-Colic Bottles have a SkinSoft™ textured nipple that is accepted by 94% of babies* and a patented vented base that regulates pressure ensuring babies do not get air in their tummies while feeding. The wide openings make it easy to clean, fill and assemble. The bottle self-sterilizes in 3 minutes in the microwave in 3 easy steps for easy cleaning. Includes 1 slow-flow nipple. *Market research 2009-2017 tested with 1,508 babies. Features: -Includes one 9 oz / 260ml bottle -Reduces colic thanks to vented base -Spill-proof lid, also working as a measuring cup -Patented nipple, shape mimics mom -Self-sterilising in three easy steps -BPA-free -Recommended age: from birth