# AXEN Soft Flask TPU Foldable Running Hydration Flask \(500ml/16oz\)

AXEN Soft Flask: a 500ml foldable TPU hydration flask for runners and outdoors buffs. Lightweight, BPA-free, with a dust-covered bite valve—check it.

- [Original product page](https://www.ofertitastop.com/us/product/axen-soft-flask-tpu-foldable-running)
- [View offer](https://www.ofertitastop.com/us/visit/axen-soft-flask-tpu-foldable-running)
- Market: US
- Language: en-US
- Currency: USD
- Product updated: 2026-10-16T08:10:58.319Z
- SKU: ofertitastop-us-92622
- Category: Sporting Goods > Outdoor Recreation > Hydration Systems
- Source store: amazon US
- Active deal: Yes
- Price: 8.99 USD
- Previous price: 9.99 USD
- Discount: 10%
- Rating: 4 / 5
- Reviews: 740

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## Description

## What it is
The AXEN Soft Flask is a foldable, 500ml/16oz hydration flask designed for runners, cyclists, hikers, and anyone enjoying outdoors activities. Crafted from food-grade TPU and BPA-free, it aims to provide a lightweight, flexible alternative to rigid bottles. The soft design allows it to fold down when empty, making it easy to stash inside a hydration vest or waist belt.

## How it works
This hydration flask uses a durable bite valve with a dust cover for easy sipping on the move. The silicone mouthpiece is gentle to use and helps water flow smoothly without a lot of effort. The recommended temperature range is 0-60℃, which covers typical outdoor scenarios from cold morning runs to warmer midday sessions.

## Why it matters for active use
If you prioritize quick hydration during workouts, a soft flask can reduce bulk when not full and save space in a pack. The flexible body adapts to the amount you carry, and the lightweight material reduces overall load during long runs or rides. While not a perfect substitute for all-day water storage, it shines in fast, repetitive refills and on-the-go sipping.

## What to know before buying
The product includes one hydration flask (500ml/16oz). There is no information about additional accessories or color options, so availability may vary by listing. The material is described as food-grade TPU and BPA-free, and it’s marketed as easy to clean. If you need a rigid bottle for stability or a larger capacity, this may stay on the periphery of your gear kit.

## Pros and what stands out
- Lightweight, collapsible design helps conserve space when empty.
- Reusable, BPA-free TPU appeals to eco-conscious users seeking a simple hydration solution.
- Durable bite valve with a dust cover supports quick sipping without leaks.
- Suitable for a wide range of activities: cycling, marathon running, hiking, and more.

## Cons and limitations
- Capacity is fixed at 500ml/16oz, which may require more frequent refills on long runs or rides.
- Only one size is listed, if you need larger or smaller options, this may not fit your needs.
- Some users might prefer a rigid bottle for certain packs or layering during high-output activities.

## Who it’s best for
This soft flask is a good fit for runners, hikers, and endurance athletes who value a compact, easy-to-pack hydration solution. It’s suitable for adults and children alike, and it works well with hydration vests or waist belts when space is at a premium.

## Who might want to skip it
If you routinely require higher payloads per refill, need multiple bottle options, or want a more rigid bottle for seat-back stability in a pack, you may want to consider other designs.

## When it makes sense to buy
Consider AXEN when you want a lightweight, collapsible hydration option for fast-access sipping during activities, and you’re okay with a single 500ml capacity. It’s especially handy for workouts where space is at a premium and quick refills are common.

## What to check before purchasing
- Confirm compatibility with your hydration vest or waist belt, ensuring the cap and mouthpiece meet your preferences.
- Check cleaning guidance to ensure the TPU material is easy to maintain for repeated use.
- Consider your typical activity duration and whether 500ml/16oz meets your personal hydration needs.

## Practical use example
During a long trail run, you can slip the soft flask into a pocket of your vest when empty and it folds neatly, taking up minimal space. When you reach a water station or a refill point, you can quickly sip via the bite valve and then fold the empty bottle back into your pack.

## FAQ (quick take)
- Is the bottle BPA-free? Yes, it’s described as BPA-free.
- Can it be washed easily? The material is noted for easy cleaning, though specific cleaning instructions aren’t provided.
- Is there more than one color or size? The entry only mentions a 500ml/16oz option, other colors or sizes aren’t specified.

## Final decision
Is it worth it? Worth considering if you want a lightweight, foldable hydration option that plays well with hydration vests or waist belts and you don’t need a larger capacity.

## Images

![AXEN Soft Flask TPU Foldable Running Hydration Flask \(500ml/16oz\) — 1](https://www.ofertitastop.com/i/c-AxHlwKBAJiaYIHvs2YW6Axl8aJyPel_asRigdfCLHaduq5xWXDCH1OjVqjbBu9jN6k8L6HPaNfXWpilAO_GHbGIXfbqFxWNnNPGFpJbbCT3_u4lkE7mwM3XQ.jpg)

![AXEN Soft Flask TPU Foldable Running Hydration Flask \(500ml/16oz\) — 2](https://www.ofertitastop.com/i/KTIswptG1wfvFVBrM8kB87ENqBTdLELbJbEs7fsRZkw9uXH3pQzWJjjY9T1EkxVZ-6cS6o4JbEW2HRtPnbplFC14DcIHR7E1fHrHyoempBi79BKN4vBCzZy_Dg.jpg)

![AXEN Soft Flask TPU Foldable Running Hydration Flask \(500ml/16oz\) — 3](https://www.ofertitastop.com/i/dFX6uwvcg1AgP8SZQIVHsmReirW2k9P6GjsG-Yk9N0uffmnoZ425aDFByRI_Jf92MIyzmrOYC-YWDw_TtqHCqV2X1xK3-3Df-QrbVwCGapHc73x2a99RDtlHYA.jpg)

![AXEN Soft Flask TPU Foldable Running Hydration Flask \(500ml/16oz\) — 4](https://www.ofertitastop.com/i/lmihq47LptAM-obCYqFSYuoB68TuFi9rsPrbesj6Kny97FhxO1Qc4V13oZydPR0WUkNidM53pvkiq8-rboEn649i56_7boHevflk8_Y3rFGoHtnX148lPWIqqA.jpg)

![AXEN Soft Flask TPU Foldable Running Hydration Flask \(500ml/16oz\) — 5](https://www.ofertitastop.com/i/OmQcuGqKPLGdyj7w9CG_9CzaAT6af52SCt2rAR3JbL-vPFWI6CjJTH1e2o9WF9XAGCPlOn79hkG6NYt1nyllSoSv_LPk6nrLl0wqI4YYqwSixEEDo2Pbt_Tx1w.jpg)