Dh and I are taking DC to a caravan for a weeks break. DD will be 3 weeks from her first birthday when we go. She drinks formula and I think there is a chance our steriliser won't fit in the microwave there. It's quite big, I have to take the plate out to fit it in ours at home. Is it ok to put her onto cows milk a few weeks before she turns one if it doesn't fit, or should I try and get a cheap second hand electric one?