Just the right size for little hands, our Hydro Flask for kids is made with the same stainless steel and double wall vacuum insulation as our bigger bottles. Every sip stays icy cold for up to 24 hours, so when recess or practice wraps up, the perfect refreshment is waiting on the sidelines. With a colorful, easy to -clean Straw Lid and a durable Flex Boot this is the perfect companion for any adventure. Durable 18/8 proGrade Stainless Steel construction. BPA Free and Phthalate Free.