Our award-winning sippy cup features our innovative b.box weighted straw that moves with the liquid – whatever angle the cup is tilted. Our redesigned straw has a unique two-way valve, ensuring easy drinking and NO leaks, even with warm water. The sippy cup ensures that tots can drink to the very last drop. They can also drink lying down, making it the ideal transition cup from bottle/breast feeding to milk in a cup recommended for 6m+ Weighted straw moves with the liquid, whatever angle the cup is held unique two-way valve, ensuring easy drinking and NO leaks Encourages independence with easy-grip handles Simple flip top lid Base also fits training cup lid and spout cup lid Sippy cup base is microwave safe. Heat in intervals of 30 seconds and stir thoroughly. Test temperature of contents before serving.Dishwasher safe Sippy cup base is microwave safe. Do not microwave sippy cup lid and straw Dishwasher safe Made from PP and silicone, steel weighted ball Dimensions (cup with lid) 15 x 12 x 7.5cm 240mls/8oz capacity BPA, Phthalates and PVC free