I've bought several of the premium PPSU bottles one a bundle and two separately. I was so concerned about my grandchild moving on from breastfeeding as was his mammy as she was returning to work and because he was refusing all bottles offered. I was amazed at how well he took to these bottles and is now drinking full bottles without issue, my daughter-in-law has said its nothing short of miraculous! Thank you so much, your products have taken such a weight off our shoulders and we have a happy baby who likes to have his bottle! I would recommend these for anyone to try if they are having difficulties with their baby transitioning from breast feeding to the bottle, they have worked wonders for us!