The bear-patterned bottle on the left is glass, 80ml. The middle and right bottles are made of a plastic-like material (transparent), 240ml, and cannot be sterilized in a microwave. Nipples are not included. All were purchased used, and my exclusively formula-fed child used them for several months. Please be aware of scratches and stains from use. Not for individual sale, simple packaging. Recycled box will be used.