Introducing the Dr. Brown's Natural Flow Options+ Anti-Colic Narrow Glass Baby Bottle 4oz 2 Pack. This bottle set is designed to provide a comfortable feeding experience for your baby without any discomfort from trapped air. The bottle features a narrow neck design and is made of glass material, making it both microwave and dishwasher safe. The silicone nipple material ensures a natural feeding experience for your little one. The bottle set comes in a sleek white color and has a capacity of 120ml/4oz.