Can anyone recommend good milk bottle for little one? Currently using avent but recently baby not drinking much not sure if its teats issue or she's teething. Was thinking if I should change to another brand. (baby is 4 month plus) Any advice?

Like diapers, bottles are trial and error. There are so many brands in the market and what might work for one baby might not work for yours. That said, Pigeon (very soft teats), MAM (anti-colic) and Dr Brown (anti-colic but has a lot of parts to wash) are very popular brands. I rotated Pigeon, Avent, Tommee Tippee, MAM for my baby and she ended up having bottle confusion and has been rejecting all bottles. Yes, decreased appetite is a teething symptom. Do check out this link to see if your baby has more teething symptoms before you confirm it. http://sg.theasianparent.com/be-prepared-for-babys-teething-symptoms/