I bought this bottle warmers after reading the good reviews on this site. Did not count the fact that I bought MAM Anti-Colic bottles with a removable bottom. Now, these bottles do not accept steam bottle warmers and almost always flee. In addition, as their bottom is thicker than ordinary bottles, we must put more water into the unit, the heating time is longer and, even then, the result is mixed ... I am me therefore folded over an old microwave, more reliable and who does not run away baby bottles. Conclusion: Device to avoid if you have MAM bottles.