STAY HYDRATED: Reusable bottle features markings for monitoring water intake. SPECIAL LID: Features a pop-up straw for easy sipping; leak and spill-proof when closed. DURABLE: Lightweight, break-resistant, single-walled Tritan stands up to daily use and keeps drinks cold. SMART DESIGN: Wide mouth makes it easy to add ice and drinks, or to clean the interior. PERFECT FIT: Measures 4″ L x 4″ W x 9″ H and holds 32-fluid ounces.