The NUK First Choice Plus Starter Set includes 4 glass baby bottles with silicone teats and Bottle Box.With this high-quality set, parents have everything right from the start. It contains a bottle box for storing up to six NUK First Choice+ or other NUK Baby Bottles. The box is made of the light and very resilient synthetic material, polypropylene (PP). The set contains four NUK First Choice+ Glass Baby Bottles with straightforward, simple motifs and two different filling volumes: two bottles for smaller appetites with 120ml and two with 240ml. The advantages of glass baby bottles are that they are durable, hygienic, environmentally-friendly and easy to clean. The non-slip screw ring makes the bottles easy to open and close while the wide bottle neck makes them simple to fill and clean.Every NUK First Choice+ Baby Bottle in the Starter Set comes with a silicone NUK Teat that is right for the jaw with a naturally wide lip rest, which give babies a familiar feeling as if at their mother’s breast as they drink. The NUK Anti-Colic Air System of the teat helps reduce the risk of colic, as your baby swallows less air while drinking. All NUK First Choice+ Glass Bottles are suitable for when you both bottle and breastfeed and “grow” with your baby, for the bottles are easy to combine with other NUK First Choice Teats and Drinking Lids.