Evenflo Feeding"s BPA-free Triple Flo» Tumbler features an adjustable valve that grows with your child. The soft silicone insert with 3 different flow rates allows you to control the amount of liquid your child receives. The valve also has a "close-off" position designed for leak free, on-the-go use. Its ergonomic spout is great for little mouths, the size perfect for little hands and concave lid just right for little noses.