Great product, excellent quality
We used these from birth, my son had no problem using them and wasn't too windy after a feed either. They pull apart into 4 pieces and are really easy to clean, we've steralised them in boiling pots, steam sterilisers and steraile water, they've come up nicely every time. They're quite strong too, these bottles have been taken on all sorts of day trips, knocked around and barely a sign of use. I love them and recommend to anyone looking for bottles for their babies!