The Munchkin microwave sterilizer work well for me. It's easy to use. Comes with tongs to prevent burns. However, I must say it's quite large and may not fit in a normal conventional microwave. For me I find that the tabs closes really good as long as you don't overloaded. They fit my smaller bottles 4 ounces and larger ones that are 9 ounces. I use the Avent bottles. It's also a really good price compare to others on market. I believe mine cost me about $20.