Designed to fit Baby Nova bottles these natural latex teats come in 2 sizes 0-3months and 3-24months. These orthodontic shaped teats are designed to train lips, jaws and tongue. Each teat has an anti-colic ventilation valve and they are available in slow, medium and fast flow. Please note these teats do not fit wide neck bottles such as the NUK bottle. All come as a pack of 2.