Reduces colic thanks to vented base. The patented vented base of the Anti-Colic bottle ensure that the babies can drink calmly and relaxed. MAM Silk nipple makes switching between breast feeding and bottle feeding especially easy thanks to its patented silky soft silicone surface. The ventilation holes in the base perfectly regulate pressure balance and airflow. Wide opening for fast and easy cleaning; easy filling. Self sterilising in 3 easy steps MAM Anti-Colic bottles have a SkinSoft textured nipple that is easily accepted by babies and a patented vented base that regulates pressure ensuring babies do not get air in their tummy 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 2 slow-flow nipples. Expanded assortment available online. This product is not available in our stores.