Our award-winning sippy cup features the innovative b.box weighted straw that moves with the liquid - whatever angle the cup is tilted. The unique two-way valve ensures easy drinking and no leaks, even with warm water. Weighted straw moves with the liquid for drinking from any angle Leakproof design with unique two-way valve for warm or cold liquids Easy-grip handles encourage independent drinking Flip-top lid keeps straw clean and hygienic Base also fits training cup lid and spout cup lid Replacement straw + cleaner set available separately, ensuring years of happy sipping and a happy planet Free from BPA Materials: Cup and lid – PP; Straw – silicone; Weight – PP enclosed stainless steel Dimensions: 5.91inH x 4.72inW x 2.95inD Capacity: 8.1 fl oz Care instructions: Dishwasher safe (top rack only); steam, boiling water and UV steriliser safe; sippy cup base microwave safe – do not microwave lid or straw