Bottles/ and diapers I'm hoping to breastfeed unless unable too I was wondering about how many bottles should I buy…

Bottles/ and diapers

I'm hoping to breastfeed unless unable too I was wondering about how many bottles should I buy because although I want to breastfeed I'm going to have to bottle feed even if it's my own breastmilk since I'll have to go back to work as soon as I get the ok. So I guess my question is about how many bottles do I need to buy. And then another thing I'm not too sure about is how many newborn and size 1 diapers should I buy any advice. And lastly which brands of bottles and diapers would you guys most recommend. sorry so many questions.