sippy cup - appleOur multi award winning sippy cup features our clever weighted straw that lets kids drink at any angle. The soft silicone straw has a unique two way valve, ensuring easy drinking and no leaks, even with warm water. Weighted silicone straw moves with the liquid, even when titled upside down Flexible silicone straw top is the ideal length and fit for babies' little mouths Leakproof design with warm or cold liquids Measurements on base to track hydration