How many bottle brands should I buy & how many total bottles should I get?

Batrina

I am currently 13w+4 days pregnant. I’ve actively been making registries and this is my first baby. I plan to breastfeed and transition baby to bottle feeding, however I plan to pump instead of formula feed. My best friend has a 2 year old and she told me I should at least have 3 bottle options. I’ve picked them out but I don’t know if 3 is too many or what.. please help!