When drinking the touch flow valve opens so liquids pass through the spout only when your child sips the soft silicone spout promotes natural drinking action and healthy oral development and is recommended by a paediatric dentist trainer handles help baby guide the cup to their mouth and drink by themselves the unique one piece no spill soft silicone spout is easy to use and clean r r r r with clik it technology hear the click to know the base is locked to the lid