glass bottle is nice (discrete green grounds) the bottle sits nicely in hand, is not too heavy. I replaced the NUK pacifiers sold with (Medium) by the same size small because the flow was too fast for my daughter 2 months (and it's a greedy). The shape of the teat is Ergonomic and take well in the mouth, sucking seems optimal; aeration is perfect, no leakage. I am fully satisfied with the product.