dr brown bottle and nipple size
So this might be a dumb question but my son now needs to move up in nipple size for the dr brown bottle but the collar part is to small on the bottle for the size 2 nipple...what do you buy to make them fit? The standard collar fits size 1 but what do you need for a size 2 or 3 nipple? I've looked online and can't seem to find any information...thanks in advance
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