The pacifier Colour Glow, includes 2 pieces, makes it easy for both parents and little ones to find the pacifiers in the dark and accommodates the frustration it can cause for parents to stand in the middle of the night - in total darkness - looking for the pacifier with a crying child. Simply hold the pacifier up to a lamp for 5-10 sec. to activate the effect. The luminescent effect lasts for 8+ hours. It's round nipple is made of natural rubber. The nipple is equipped with a valve that lets out air when the baby closes down on the nipple thereby flattening the nipple to shape naturally after the baby's oral cavity. The round lightweight shield faces away from the sensitive and delicate skin around the baby's mouth to ensure minimum contact with the baby's nose and mouth, which means less chance of moisture build-up from saliva that can cause rashes and sore spots.