The Nuby Tumbler Sippy is made of tough break resistant polypropylene. Its tapered design and 7oz (200 ml) size is perfect for toddlers. The drink spout top provides protection against spills for your playful learner. The sippy tops are especially useful when on the go or for storage in the refrigerator. * Tapered design is easier for small hands to hold * Helps toddlers learn to drink from a regular cup * Sippy lid helps eliminate messy spills * Recommended for children 9 months and up * Dishwasher safe (top rack) * Not recommended for microwave use