This is a set of six Tommee Tippee Closer to Nature bottles. They are 260ml and are clear. They have teats which are breast like and flexible to make babies find them easier to use (each bottle comes with one teat and a lid). You can buy replacement teats separately when necessary as teats will eventually wear or break especially if they get chewed. They are also shaped to make them easier for the person feeding them to hols. They are anti-colic as they have a special valve to eliminate excessive air flow. The bottles are BPA and phthalate free.