Lansinoh glass bottles for storing breast milk

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Does anyone know if you can steralise these?

Am trying to work out whether the breast milk storage bags or these glass bottles are best value.

if glass presumbably can steam sterilise as normal? Mind you you'd need a lot of bottles to store expressed milk. We used lansinoh bags and have also used pea in a pod freezer trays (they have lids) - just transfering cubes to freezer bags so we only needed one pair of trays. try here