I'm leaving my exclusively breastfed baby with my mum while we go to the NFL in London. She will be 12 weeks by then. She takes a bottle of expressed ok so I'm not worried about that and we are doing a practice day first. I know I'll have to pump whilst I'm there but looking for some practical suggestions on how I can keep the expressed milk. Anyone any ideas/suggestions on how I can keep the milk cool for +12 hours and how I can sterilise the pump on the go. My pump has batteries so can take it with me. We are driving there and back from Sheffield. Really don't to bin the milk as I will have used all my freezer store being away. TIA.