Nuk First Choice + Baby bottle has a silicone teat, size 1 (0-6 months), medium orifice (M) and with anti-colic technology. The teat has a larger surface with a cross slit, which allows the baby to drink the contents of the bottle easily, without ingesting air. Silicone is an extremely elastic material, very soft, resistant to high temperatures and with a neutral flavor. It is chemical-free, transparent, can be boiled and has a smooth surface, important properties for teats and pacifiers. Nuk Genius Pacifier has characteristics that make it unique: - Concave shape, which allows maximum freedom for movement of the tongue; - Integrated channels along the teat, which reduce pressure on the jaw and continuous contour lines, which strengthen the teat, providing additional safety. Silicone is free of harmful substances and has a pleasant and smooth surface, with no smell and a neutral taste. It is extremely resistant to high temperatures and sunlight.