The b.box Toddler Cup lets little kids drink like big kids. It is the ideal way for kids to learn to drink from a cup as it mimics the flow of a big kids cup, by funnelling liquids into the rim for easy free-flow drinking. The cup features a unique water window in the lid so kids can learn to see water as they're drinking and judge how much to tilt their cup. Interchangeable base and lid means you can switch between the spout lid (4m+), sippy cup lid (6m+) and training lid (12m+), as baby grows.