Nanobebe bottles


Has anyone used these? We used comotomo with my daughter and loved them but the concept of the nanobebe sounds good and love how they stack. I was wondering if I should just invest in the 3 pack since one alone is $11. We also have about 4 other brands on hand to see what baby takes. I plan to exclusively breastfeed for 4-6 weeks to establish supply and then will be exclusively pumping.