Here's what other sites are saying:
Nathan Camp & Hike Push Pull Caps 4 Pack Silver NS4589019000. Soft-sip cap gives you easy access to fluids. Soft-sip nozzles designed for greater comfort when drinking on-the-go
The Push-Pull Caps from Nathan are completely interchangeable and work on any Nathan flask. Whether you're looking for backup caps or you just want to swap out the ones you have, the Push-Pull Caps are right for you. PRODUCT FEATURES:
- Appalachian Outdoors
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.
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