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Feature

Spill-proof guaranteed with flip-top lid closed
Simple Stack for clutter-free storage
Simple Sip Rim for open top use as child grows
6 oz. for ages 6M+ with a BPA-free durable soft straw, flip-top lid, and easy to hold handles
Interchangeable Lids: Lids can be interchanged between any Sippy Stackers cup

Description

Summer Infant Sippy Stackers encourage your child's independence. The guaranteed spill-proof cups are perfect for little ones at home or on-the-go. The interchangeable lids can be removed, and cups can be stacked for easy storage. The Simple Sip Rim has threads on the inside to provide a smooth surface for drinking when cups are used without lids for older children.