"[This review was collected as part of a promotion.] These have been my favourite bottles out of the many I’ve tried as they’re easy to hold and not too wide. Great they they’re compatible with the Medela pumps so you can easily express directly into the bottle you plan to feed with. Easy to clean and sterilise however I have noticed some fogging on the plastic after repeated sterilisations. Only bug bear is the American “ounce” metric on the side of the bottle is useless- wish it had different ml denominations (other than the 50ml on the right side) to help measure out perfectly when making formula."