Quantity of 12 buttons. Wonder Flo Regulator Buttons for the cup. This cup allows a person to drink while in a reclined position. This item comes with just the (12) buttons which attach to the cup. The cup itself has a spout that has a 1/4in (6.4mm) hole that prevents spillage. Press the rubber stopper to release liquid flow into the mouth. Cup is made of soft, autoclavable plastic. Replacement lids and buttons are available. Holds 8 fl. oz. (237ml). Household dishwasher and microwave safe.