I was exclusively pumping and I rotate between 3 bottles during NB stage as they feed really frequently (2-3 hours). As for storage bottles I bought a dozen :)
I had 2 bottles only for feeding baby. 1 to use and 1 for spare. Do you intend to use the bottles as a storage bottle as well?
I bought 2 bottles for newborn. As they grow, change to bigger ounces bottle.
thanks
Anonymous