Used a non sterile bottle/teat on one week old, so worried

[tyu]

I picked up the wrong one and they’d already used it this morning so it had been sat out all day, I’m so worried, do I need to look out for anything?

hi, I done this too with my baby except it was the wrong bottle as well full of milk😳he was fine and was neither up nor down. But I believe it may cause an upset tummy.

Worst case scenario a bit of diarrhoea, but your little one will very very likely not even show any symptoms! Easily done

Please don't worry, it will be absolutely fine. My little one once drank out of a mouldy bottle and I didn't realise until too late. No harm came at all. I know at one week old you just want everything to be perfect and to keep them safe, but the time will come when they will only eat their food off the floor (I'm looking at you DD).

Well they don’t sterilise in America, their national paediatric association say it’s not necessary and American babies seem ok so I wouldn’t worry too much.