Hello again Ray! I use a NUK baby bottle sterilizer. I'm not sure the exact model. It was sent to me for free with my first shipment of Cayston from CF Services Pharmacy. If I remember right from another thread, you may be starting Cayston soon, so perhaps this would be a great way for you to get a sterilizer?
I have heard not to use the microwaveable kind, but others on here do. I hate how centers seem to have different guidelines and advice as to how to sterilize properly. It's all so overwhelming and confusing! You also can't go wrong with good old fashioned boiling for 10 mins, but I know that can be tedious.
As to your last question, nope you don't need to worry about the blue plastic thingy! I run it through my sterilizer and still boil from time to time. They withstand the heat just fine!
Hope this helps at all!
Take care,
Autumn