NUK First Choice Baby Bottles make the transition from breast to bottle feeding easier. Some parents prefer glass over plastic bottles because if looked after correctly, they can be more durable. As with all NUK First Choice Bottles, this glass bottle is designed to make the trasition from breast to bottle feeding easier. It features the original NUK orthodontic shaped teat, with an extra wide lip support which stimulates breast feeding as closely as possible, and the NUK Anti-Colic Air System which minimises infant colic caused by harmful swallowing of air. The NUK First Choice Bottles are compatible with all NUK First Choice Teats.