Medela Calma Feeding System Made in Switzerland One size fits all, usable throughout the entire breastfeeding period. There's no need to change nipple sizes as your baby grows. Can be used with Medela breast milk bottles. You can pump, store, and feed using Medela breast milk bottles. The included multi-lid prevents spills while on the go. All Calma parts are dishwasher safe (top rack). Brand new, unopened. The packaging on the back is partially damaged, but it's on the outside of the package, so there's no problem with the product itself. Price is not negotiable. Available for immediate purchase.