Our design and development team took up the challenge of creating the best non-plastic sip spout on the market. In accordance with the desires of leading pediatricians, our new XL Sipper was designed to be stiff and free flowing to support the natural development of teeth and gums in toddlers. Noting that most silicone spouts were fragile, we also reinforced the tip of the spout to better withstand the teething instincts of growing toddlers. Lastly, our new spouts are tinted blue so toddlers will not confuse the new "big boy/girl" spout with a baby nipple.