Designed for children above 6 months who are transitioning from bottles to sippy cups. These spouts are designed with a "small wing" to help your child uniformly distribute the applied force while they are sucking. This novel approach helps to reduce the pressure on their teeth and jaw, so that your child's teeth can grow healthily. Soft silicone spout eases the transition from bottle or breastfeeding to cup. Small Wing design helps soothe your teething baby and reduce the risk of misalignment.