Have the bottle several times boiled and put in the dishwasher. At first I was skeptical whether the bottles after repeated use become cloudy and milky. This is not yet the case. However, I must say I use it also about 4-5 times a week.
The price / performance ratio is great, because the bottles are much more expensive in the drugstores. However, you should use a 1 hole teat for the use of breast milk. The included suction cup is a 2-hole sucker.
