The Nathan Reusable Race Day Cups provide an eco-friendly way to hydrate during the big race. As a sanitary alternative to standard water stations, these cups collapse into your belt, pack, or pocket for convenient storage. When you need extra fuel to find the finish line, reach for the Nathan Reusable Race Day cups! Attachment loop to secure the cup to your gear Easily collapses to store in your belt, pack, or pocket Sanitary alternative to standard hydration stations Required by many races