The Problem with Sippy Cups
Sippy cups were designed for children to drink from a cup with reduced spillage, not to enhance children's feeding or speech development. Some of the problems associated with sippy cups: Hard spouts of sippy cups can interfere with the development of feeding skills. Infants use an anterior-posterior suckling pattern (front to back tongue movement) initially and should transition to a more mature swallowing pattern, involving tongue tip elevation by age one. Over-use of sippy

