Ergonomically designed wide-neck bottle, which through the innovation of air passage ensures unique advantages in feeding. It has a natural flow system and a silicone nipple. By using it with the air passage system, you benefit from all the advantages for healthy feeding. Without the air passage system you have the convenience of a compatible bottle with air passage through the nipple. \ \ Advanced know-how nipples, specially designed for the natural flow bottles dr. brown's™ options+ wide-neck. \ \ They are made of extremely soft, high-quality silicone, without bisphenol–a. \ \ dr. brown's options+ bottles are the choice preferred and trusted by parents, because they are proven to reduce colic, reflux and stomach or intestinal gas caused by feeding in infants. The innovative natural flow system included in their design eliminates atmospheric air and pressures inside the bottle, making feeding the most enjoyable experience for both the infant and the parents! \ \ It features a natural flow system and a level 1 silicone nipple suitable from 0 to 3 months. \ \ Dr. Brown's Options+ nipples are advanced technology nipples, specially designed for the Dr. Brown's Options+ natural flow bottles with a wide neck. \ \ The nipples are available in 5 sizes depending on the age of the baby: \ \ Level 1 - from 0 to 3 months, with a slow flow hole. \ Level 2 - from 3 to 6 months, with a medium flow hole. \ Level 3 - from 6 months and older, with a medium-fast flow hole. \ Level 4 - from 9 months and older, with a fast flow hole. \ level 4 y-cut - from 9 months and up, with fast flow hole - thick liquids. \ \ also find: \ \ \ spare parts options+ base - flow tube for dr. brown's wide neck bottle \ dr. brown's options+ anti-colic glass bottle with wide neck in size with a capacity of 150ml \ travel cap for all dr. brown's wide neck bottles \ \