but you dont need a pump or specific breast milk storage.
most people have pots / jars... they dont need to be labeled as breast milk storage to store BM in....
A Mum could hand express in to pyrex bowl, and then use the bottles....
feeding breast milk doesnt need special equipment if you do it direct, and you also dont need to by other equipment to express and store milk either.... hence why waste money buying it..... unless you want to convenience of it... which many people do, yes, but isnt necessary at all.... hence they are sold separately to those who would like them as well
And lets face it.... that kits is NOT adequate for formula feeders either... after all formula feeders MUST sterilise (unlike people who use bottles for breast milk)....
You could use that whole kit to feed breast milk to a newborn, but not to feed formula to a newborn.....
hence its called a starter set implying you add the extra bits you need to suit yourself.