Orthodontic nipple shape is asymmetrical with a scooped bottom Flatter to allow for more room for natural sucking motion slimmer to reduce pressure on jaw and teeth and narrower to help prevent teeth misalignment Natural shape is modeled after moms nipple while breastfeeding and wont cause nipple confusion Based on Market Research 2017 tested with 307 pacifier users Heartshaped shield fits perfectly under babys nose for easy breathing Glows in the dark to help babies and parents BPAfree silicone nipples toprack dishwasher safe Available in sizes 06 months 618 months