The ergonomically-shaped Nathan Push-Pull Cap Water Bottle 4-Pack keeps you pleasantly hydrated during intense distance efforts and daily runs. This four-pack of 10-ounce bottles serves as a direct replacement to those found in Nathan's Trail Mix and Trail Mix 4 hydration belts, as well as their QuickShot handhelds. Its high-flow, soft-sip nozzle provides efficient drinking on the move, with a silicone-grip cap for easy removal with sweaty hands.