Take n Toss 10oz Straw Sippers 4 Pk : The First Years. Straw sippers are durable enough to use over and over and affordable enough to treat as disposables. Ideal for thirsty toddlers or preschoolers who are ready to transition from spill-proof cups. Fast-flow straw keeps liquid away from developing front teeth. Snap-on travel lids are leak resistant. For 18 months and up. 10 oz. 4 per pack.