How to Use the Flask Straw with HydraPak Soft Flasks
By HydraPak | Performance Hydration Reservoirs, Soft Flasks ... | Published: 2026-10-29
Category: How-to Guides
Learn how to install and use the HydraPak Flask Straw on your soft flask for easier drinking during runs. Follow these simple steps and avoid common mistakes.
Quick answer
To use the HydraPak Flask Straw, remove the valve from your soft flask cap, insert the drink tube, and reattach the valve. Pinch the straw's base to remove it.
Why the Flask Straw helps on the move
The Flask Straw extends the reach of your soft flask, so you can drink without tilting your head back or stopping. This is especially useful during runs or hikes when you want to keep your eyes on the trail.
It also reduces the need to squeeze the flask as much, since the straw helps draw fluid up. This can make drinking more comfortable when you're breathing hard.
Compatibility and limitations
The Flask Straw is designed for running flasks, but it can also fit other HydraPak soft flasks with compatible caps. Check that your cap has a removable valve before attempting installation.
The straw does not add insulation or filtration. It is simply a drink tube extension, so it works best with water or sports drinks without pulp.
If your flask cap does not have a removable valve, this accessory won't fit. In that case, consider a different drinking system.
Step-by-step installation and removal
- Remove the valve from the cap: Twist or pull the valve out of the cap. Keep it in a safe place so you don't lose it. Check that the valve comes off easily; if it's stuck, don't force it—it may not be designed for removal.
- Insert the drink tube into the cap: Slide the straw's drink tube into the opening where the valve was. Push it in until it feels secure. Make sure the tube is fully seated to prevent leaks during use.
- Reattach the valve over the straw: Place the valve back onto the cap, ensuring the straw passes through the center. Press down until it clicks or fits snugly. Test the seal by gently pulling the straw; it should not come out easily.
- Test the setup with water: Fill the flask with water, close the cap, and drink through the straw. Check for any leaks around the cap. If you notice leaks, remove and reinsert the straw, making sure everything is aligned.
- Remove the straw when done: To remove, pinch the base of the straw and pull it out. Reinstall the valve to keep the cap sealed. Store the straw separately to avoid losing it and to keep the cap clean.
Product details
- Flask Straw: Designed for running flasks, the Run Straw accessory extends the reach of your flask, making it easier to drink. You can hydrate without stopping or adjusting your head position, which helps maintain your pace and focus.
Flask Straw - Flask Straw: To use, remove valve from cap and insert drink tube. To remove, pinch the base of straw and pull out. Installation and removal are quick, so you can switch between straw and no-straw setups in seconds.
