TILTY cup's patent-pending ergonomic design creates a comfortable and natural drinking experience. TILTY keeps the liquid at an angle and allows it to flow to the spout with minimal effort so that your little one doesn't have to tilt his/her head back as far. TILTY makes finishing the last drops a cinch and creates habits that will help your baby transition from sippy cups to "grown-up" cups easier and quicker. TILTY comes with a snap-on lid and does not have a valve, which according to the American Dental Association is better for a toddler's dental development. SMOOTHIE LID For Smoothies, Puree, Yogurt, Older Children. You can even put a restuarant straw in it to turn it into a straw cup. Since your TILTY doesn't require much tilting, your baby won't tip straw cups upside down on themselves.