Hickey® is made of food-grade plastics free of BPA, Phthalates, Latex, PVC, and heavy metals. A hickey is intended to cover the mouth completely. The incisors, canines, molars, and back molars are the teeth used by ‘Champ’ for chewing hickey. The use of spikes on the hickey can help to reduce tactile sensations in the mouth. It also aids in the reduction of irritation caused by developing teeth, as well as in the strengthening of the jaw joint.