I've name changed for this because mil is generally lovely and I don't want to be outed but I just need a rant about this I feel really weird about it.
I'm pregnant with Dc2 and mil offered to buy us bottles and asked what ones would we like. I said avent natural. So then next time I'm down she said to me she had ordered a box but when they came they were pink so need to send them back (don't know sex) but showed me them.and asked if it was the right kind anyway. I said no that's just the normal avent ones it's the natural ones I'd prefer.
So yesterday I'm down and she said she had the new bottles in and went and got them. She produced the box and said it's the normal ones again but I mean they'll be fine a bottles a bottle and gave me them.
So I said well actually the reason I wanted the natural was because I'm planning on breastfeeding this time and the natural claim to be the best for expressed/mixed feeding bf babies.
The mention of breastfeeding provoked a bit of an unexpected reaction from mil I was really taken aback. She ranted on about how I'll have a screaming baby who will be starving and will lose weight and fail to thrive.
Thankfully sil was there and I think she could see I was getting upset and she intervened but that lead to her and mil having a bf/ff argument. I really just sat there thinking why the fuck did I even open my mouth I should've just taken the bottles and said thank you 

Anyway AIBU in think a) if you ask someone what they want you get them it? I'm now left with a box of bottles I won't use and I feel bad because mil has spent money on them and I am greatful but I just won't use them I have bought the natural myself as really want to try to breastfeed.
And b) you don't tell someone how to feed their baby 