---
product_id: 513175471
title: "FITLY Soft Flask - 8.5 oz (250 ml) - Shrink As You Drink Pocket Soft Water Bottle for Hydration Pack/Running Vest- Folding Water Bottle for Running, Hiking, Cycling - Ski Water Bottles (FLASK250)"
brand: "fitly"
price: "¥6939"
currency: JPY
in_stock: true
reviews_count: 5
category: "Fitly"
url: https://www.desertcart.jp/products/513175471-fitly-soft-flask-8-5-oz-250-ml-shrink-as
store_origin: JP
region: Japan
---

# Shrinks as you drink, no bounce 8.5 oz (250 ml) capacity Ultra-lightweight 20g design FITLY Soft Flask - 8.5 oz (250 ml) - Shrink As You Drink Pocket Soft Water Bottle for Hydration Pack/Running Vest- Folding Water Bottle for Running, Hiking, Cycling - Ski Water Bottles (FLASK250)

**Brand:** fitly
**Price:** ¥6939
**Availability:** ✅ In Stock

## Summary

> 💦 Stay hydrated, stay ahead—because every drop counts!

## Quick Answers

- **What is this?** FITLY Soft Flask - 8.5 oz (250 ml) - Shrink As You Drink Pocket Soft Water Bottle for Hydration Pack/Running Vest- Folding Water Bottle for Running, Hiking, Cycling - Ski Water Bottles (FLASK250) by fitly
- **How much does it cost?** ¥6939 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/513175471-fitly-soft-flask-8-5-oz-250-ml-shrink-as)

## Best For

- fitly enthusiasts

## Why This Product

- Trusted fitly brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Featherweight Fuel:** At just 20 grams, this flask keeps you light on your feet—no extra bulk, just pure performance.
- • **Pocket-Sized Power:** Compact, foldable design fits seamlessly into running vests, pockets, or backpacks for on-the-go hydration.
- • **Eco-Friendly & Safe:** 100% BPA & PVC-free, reusable, and dishwasher safe—hydrate sustainably without compromise.
- • **Hydrate Without the Hassle:** Shrinks as you drink to eliminate sloshing and bounce—stay focused on your run or ride.
- • **Versatile Adventure Companion:** Perfect for running, hiking, cycling, skiing, and more—plus freezable to double as an ice pack.

## Overview

The FITLY Soft Flask is a 250 ml collapsible water bottle designed for active professionals who demand lightweight, no-bounce hydration on the move. Its unique shrinking design eliminates sloshing, fitting perfectly in running vests or pockets. Made from BPA and PVC-free materials, it’s reusable, dishwasher safe, and versatile enough for running, hiking, cycling, and skiing. At just 20 grams, it’s the ultimate hydration tool for those who refuse to be weighed down.

## Description

FITLY Flasks are ideal for quick drinks on the run. Gobble up a gel, wet a dry throat, or re-hydrate. Designed to be used while running or biking. Stores directly in your front, side, or back pockets. FITLY Flasks shrink as you drink so nothing ever moves, bounces or rattles.

Review: Maraton ve orta mesafe koşulları için çok güzel.
Review: I live in Fl, and I run outside. Those two components demand that I hydrate or die. I prefer the land of the living for now, so gimme the H2O. I already had the Fitly minimal pack, just not this particular flask. I originally thought I would have to bite the bullet and get a new pack altogether, but then I found the flask available by itself. I ordered, it arrived, and I have been using it for a couple weeks now. A decent amount of water for daily runs, depending on speed and sun exposure I would say 1-2 hrs. The only hiccup I have noticed is the screw on top with the hose attached can be a little tricky to get on without spilling some water. Other hydration packs have a slide that seals the reservoir; I can see why the screw top here, based on minimalist approach. It is worth the small effort with closing to be able to have a smaller pack to carry.

## Features

- HYDRATION ON THE MOVE: Our collapsible running soft flask is a compact and eco-friendly way to stay hydrated on the move! The soft water bottle is the perfect hydration tool for active individuals. Our soft water bottles for runners shrink as you drink, taking up minimal space and won’t slosh around, making it perfect for running, hiking, skiing or any rigorous activity.
- SHRINKS AS YOU DRINK: Our running vest water bottle is uniquely designed to shrink as you drink. This ensures the water doesn’t slosh around, bounce or rattle. The flexible design of our hydration flask shapes to your hand & body, meaning the soft flask is never unwieldy. Our flexible running flask features an intelligent bite valve & leak-resistant mouthpiece.
- STAY LIGHT ON YOUR FEET: FITLY’s collapsible flask is purposely lightweight ensuring your light on your feet and not weighted down by unnecessary bulk. At FITLY, reusability is deeply important to us, and our water bladder is no exception. Enjoy limitless use from our portable soft water bottle for running vest that is 100% BPA & PVC-free.
- HYDRATION ON THE MOVE: Our soft flask is specially crafted for vigorous activities such as running, hiking, cycling and climbing. The perfect sporting companion, take it everywhere with you! Our soft water bottle can be folded and tucked into your pocket or bag. Our soft flask water bottle comes in 5 size variations and are freezable so they can double as an ice pack.
- DIRECTIONS FOR USE: We recommend rinsing the flask thoroughly before first use. If you experience taste mix ½ a teaspoon of BAKING SODA with water, shake and rinse. Users have also found the following to be useful: Fill with MILK, shake, and rinse. Add drops of lemon. Let an orange peel or tea bag set in the flask for a couple of hours. To hydrate, simply softly bite the mouthpiece and press the soft flask and enjoy! The harder you press, the faster the liquid will exit.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BBG66G8T |
| Batteries required | No |
| Best Sellers Rank | #31,746 in Sporting Goods ( See Top 100 in Sporting Goods ) #23 in Camping & Hiking Hydration Flasks |
| Care instructions | Dishwasher Safe |
| Customer Reviews | 4.2 4.2 out of 5 stars (3,397) |
| Date First Available | 28 August 2022 |
| Included components | F2B |
| Is mould resistant | Bisphenol A (BPA) Free, Polyvinyl Chloride (PVC) Free |
| Item Weight | 0.02 Kilograms |
| Item model number | F2B |
| Number of pieces | 1 |
| Product Dimensions | 7.01 x 7.01 x 19 cm; 20 g |
| Specific uses | running, hiking, cycling, climbing |

## Product Details

- **Bottle type:** Vented Bottle
- **Brand:** FITLY
- **Capacity:** 250 Milliliters
- **Colour:** Black
- **Material:** TPU

## Images

![FITLY Soft Flask - 8.5 oz (250 ml) - Shrink As You Drink Pocket Soft Water Bottle for Hydration Pack/Running Vest- Folding Water Bottle for Running, Hiking, Cycling - Ski Water Bottles (FLASK250) - Image 1](https://m.media-amazon.com/images/I/61UuMfIS3wL.jpg)
![FITLY Soft Flask - 8.5 oz (250 ml) - Shrink As You Drink Pocket Soft Water Bottle for Hydration Pack/Running Vest- Folding Water Bottle for Running, Hiking, Cycling - Ski Water Bottles (FLASK250) - Image 2](https://m.media-amazon.com/images/I/71lAUdjoEOL.jpg)
![FITLY Soft Flask - 8.5 oz (250 ml) - Shrink As You Drink Pocket Soft Water Bottle for Hydration Pack/Running Vest- Folding Water Bottle for Running, Hiking, Cycling - Ski Water Bottles (FLASK250) - Image 3](https://m.media-amazon.com/images/I/71lw832yzGL.jpg)
![FITLY Soft Flask - 8.5 oz (250 ml) - Shrink As You Drink Pocket Soft Water Bottle for Hydration Pack/Running Vest- Folding Water Bottle for Running, Hiking, Cycling - Ski Water Bottles (FLASK250) - Image 4](https://m.media-amazon.com/images/I/7124vR9EtlL.jpg)
![FITLY Soft Flask - 8.5 oz (250 ml) - Shrink As You Drink Pocket Soft Water Bottle for Hydration Pack/Running Vest- Folding Water Bottle for Running, Hiking, Cycling - Ski Water Bottles (FLASK250) - Image 5](https://m.media-amazon.com/images/I/71cNTvutOVL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by N***T on 9 June 2024*

Maraton ve orta mesafe koşulları için çok güzel.

### ⭐⭐⭐⭐⭐ Review
*by K***E on 16 June 2023*

I live in Fl, and I run outside. Those two components demand that I hydrate or die. I prefer the land of the living for now, so gimme the H2O. I already had the Fitly minimal pack, just not this particular flask. I originally thought I would have to bite the bullet and get a new pack altogether, but then I found the flask available by itself. I ordered, it arrived, and I have been using it for a couple weeks now. A decent amount of water for daily runs, depending on speed and sun exposure I would say 1-2 hrs. The only hiccup I have noticed is the screw on top with the hose attached can be a little tricky to get on without spilling some water. Other hydration packs have a slide that seals the reservoir; I can see why the screw top here, based on minimalist approach. It is worth the small effort with closing to be able to have a smaller pack to carry.

### ⭐⭐⭐⭐⭐ Review
*by T***X on 19 March 2023*

I love using soft water bottles because they don't take up much space. They are lightweight, flexible and collapsable which is ideal for when I go running! And this one fits perfectly into my waist bag :) It's also leakproof and I did not notice any bad taste in my water plus I really like this type of mouthpiece!

## Frequently Bought Together

- FITLY Soft Flask - Shrink As You Drink Soft Water Bottle for Hydration Pack - Folding Water Bottle Ideal for Running, Hiking, Cycling, Climbing & Rigorous Activity
- Body Glide For Her Anti Chafe Balm | Chafing stick with added emollients | Great for dry, sensitive skin and/or sensitive areas | Use on chest, bra, butt, groin, arm, and thigh chafing | 1.5oz
- Fitgriff® Running Belt for Men & Women - Secure Jogging Pouch for Phone, Keys & Essentials - For All Cell Phones

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-19*