Flexible and foldable, the Nathan Reusable Race Day Cup are easy to stash while you run but deploy in an instant when you reach a water station. Nathan constructed the reusable cups from 100% TPU, which means they collapse down quickly for easy storage. A ridge rim makes for easy drinking, and an attachment loop lets you secure it to something else. The Nathan Reusable Race Day Cup holds more than 6 oz of water to replenish you during your event.