T.F.
Completely unnecessary and possibly unsafe (like you said- plastic in the microwave). All of the sterilizers and anti-bacterial stuff is overkill and is causing more problems than they solve, such as strains of resistant germs. If you want, boil everything when it's new, then washing with mild soap in hot water or running through a dishwasher is enough for daily cleaning. The only other things I have found to be crazier and more unnecessary than sterilizers are warmers for baby wipes (maybe they need these in Alaska??)