This is a set of 5 baby bottles: 4 Pigeon Mother's Milk Realization bottles and 1 NUK bottle. Three of the Mother's Milk Realization bottles have a Snoopy design, and one is a plain, non-designed bottle. The NUK bottle has a Bambi design, and the measurement markings change color with temperature. The Mother's Milk Realization bottles were used for about a year. The NUK bottle was only used about 5 times. The NUK bottle can be used with Mother's Milk Realization nipples. They worked without any problems. There are some minor scratches and signs of use, but I think they can still be used.