We bought 8. But I know plenty of mums who just have 2! Buy less just change the teat often.
We had one bottle for milk and a smaller one for water
4 so that dun need to wash in the middle of night
Probably 4 is enough for a start ?
4 bottles would suffice
Mostly 2 is enough.
2/3 is good enough
2 should be ok
2/3 bottles
3 bottles