Purchased for colic our chip to its 3 weeks to go for it, I really was not convinced that they are of any use ... but when I switched to 260ml, I used a bottle the competing brand and 2/3 days later my chip finished its most baby bottles, screaming in pain due to gas, so I will return to mam baby bottles, and there miracle every day, meals subside! It therefore appears that these bottles have an effect on colic, also means good air discharged through the valve at the bottom! Moreover, their design is nice, but the brand lacks a bit of variety. The nipples are also a big plus, they are relatively flexible and flattened appearance that less air enters with the milk ... :-)
