5 Phases Starter Set, 4 Ounce

I give only a one star because I really like the idea , and was excited to use them, but the nipple collapsed into itself continuously and I have been unable to use them for feeding. I I have tried to find different I have tried to find different nipples but nothing fits- so disappointing

Great set! Quality glass bottles and the sleeve makes it feel more durable. My only issue, and thus the 4 stars, is that the nipples that comes with it are very fast flow for 0-3 months (as compared to the Tommy Tippee for the same age). Until the little one can handle the faster flow, I am using the glass bottles to store that day's milk and use them to heat it up before pouring warmed milk into another bottle. I've noticed that the glass bottles warm up the milk quicker than the plastic Medela storage bottles - which is fantastic when you have a crying hungry baby.

Love these glass bottles! Plastic protects glass and the glass is thick enough to heat up with out fear of breaking.

I absolutely love 5Phases, more importantly my 9 month old loves his bottles. We have been using them since he was a couple months old. Can't go wrong with a glass bottle that is protected by a plastic sleeve. We use both the 4oz and 8oz bottles. The silicone plugs are also a great feature. Highly recommend the product. Their product is truly one of a kind. They are simply fabulous!!!