What bottles do others find best

for reflux babies that are on thicker milk
I currently use normal bottles with orthodontic teat but my son is not happy withthe formula once it has thickened up too much

My youngest used to be on the AR formula. And we just used normal teats...nothing flash or expensive.
The reason why it is getting thick is because you are leaving it too long.....or your son is taking longer to drink it. This is why you can't make AR milk up in advance....only when you need it.
Perhaps try making a smaller amount to avoid this.
Or try a faster flow teat.