Looking for the perfect sized water bottle for kids with a leak proof cap? Look no further. The Nalgene OTF On The Fly Water Bottle for Kids holds 12 ounces of water or your child's beverage of choice. The silicone stopper is made extra soft for little hands to be able to push closed. Your child will enjoy the easy drinking spout, while you'll enjoy how durable it is and the leak-proof seal.