Designed to gradually develop the child's ability to drink through a straw., Bite resistant and rounded spout that mimics the first approach with the straw allowing the child to position the mouth in an "O" shape. Shaped spout to favor the correct positioning of the lips and off-center to facilitate the correct posture of the neck during drinking. Innovative removable Easy Sips valve, patented to guarantee the anti-drop seal of the cup without compromising the ease of drinking of the child. , , ,