The Medela breastmilk Store & Feed Set for Breastfeeding is a great value set with four high-quality Medela bottles and a Calma teat that is perfect for supplementing breastfed babies. The teat ensures that the baby doesn't drink too quickly, doesn't swallow air and doesn't 'unlearn' to breastfeed. While the bottles are not recommended for newborns, it is an excellent option for babies who need to be supplemented. The bottles are easy to use and help babies transition back to the breast. However, some customers have experienced leaking from the teat and the thread of the bottle.