blimey can't believe they are saying that.
I always made the bottles with boiling water and left them to cool. Then used one of those milk powder containers , which you can also sterilize if you like, has 3 compartments , and take that out with you in your bag. We did like Tiny, and never heated it up, baby never knew any different , and was great for traveling about , tip, shake and feed in seconds , good at night too, take three bottles and a powder tub up with us.
If I can't breastfeed or express and feed this tiome, I will be doing that again
also agree with toon, babies can have it too clean and they need to slowly build up there imume system