Everything is in the title. - The bottle is lightweight, its size ensures perfect grip for both parents and baby. - The bottle is solid. Certainly, bottle glass might be healthier (we lack precise study on the subject). Plastic, it may fall, be crushed, thrown ... It will result in worse than some scratches. - Finally, thanks to its fairly wide profile, in addition to taking ease hand, it is especially cleaning and drying of the bottle which are easy.
In short, I highly recommend this bottle for the first two months. Then we have adopted a larger format.