Best bottles for combi feeding

Ch

My baby is currently 6 months and he is strictly breastfed, although we have started him on solids, and attempting baby led weaning.

We have tried feeding our little one expressed breast milk in various Tommee Tippee, MAM, Avent, Dr Brown bottles and our baby just refuses them, whether it be cold, warm or room temp milk. I mentioned this to a lactation consultant and her response was “he will get used to the bottle in his own time” - very unhelpful.

I have just ordered some Munchkin latch bottles and our friend recommended Minbie, but I wondered if anyone had any luck with other brands?

Also, should I stick to slow flow teats because he’s used to the breast or would he be better off having the size that’s right for his age group? when I buy bottles I’ll always buy different sized teats and try each one.

Thank you!