It is a set that contains 2 bottles of 260 ml. They contain breast shape, because babies like it better that way. With the most natural breast-like nipple ever, this bottle contracts like a mother's breast and offers the same sensation, because babies prefer it that way. The Closer to Nature bottle offers guaranteed acceptance and an anti-colic valve, making it the best for your baby after you, and making feeding easier for everyone. Features: Chest-shaped for natural grip - guaranteed acceptance. Anti-colic valve on the nipple to reduce air intake. Soft silicone nipple with a more skin-like texture. The most nipple-like nipple with an anti-colic valve. Easy-grip nipple recommended by 97% of mothers. The Closer to Nature bottles are compatible with all Closer to Nature teats, except for the Ultra and Advanced Anti-Colic teats. The bottles are available in a wide range of capacities, sizes, colors and decorations