I bought this bag for the holidays, I take neither a sterilizer, still wanted to buy for a trip. (One has so enough luggage and expenses). The handling of the bags is simple and clear printed on the bags, so you really can not go wrong there. 3 minutes, the microwave and everything is free of bacteria. Well, now I can not judge, but from my child came no complaints. There is also plenty of room in the bag so that it can be used so universal for all types of bottles.
All in all, a very cheap and above all space-saving alternative to the sterilizer that keeps its promises. I would definitely buy again.