5 Phases Replacement Glass Insert - Clear - 4 oz

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!!!