---
product_id: 464350954
title: "FITLY Soft Flask - Shrink As You Drink Soft Water Bottle for Hydration Pack - Folding Water Bottle Ideal for Running, Hiking, Cycling, Climbing & Rigorous Activity"
brand: "fitly"
price: "109.44 DT"
currency: TND
in_stock: true
reviews_count: 8
url: https://www.desertcart.tn/products/464350954-fitly-soft-flask-shrink-as-you-drink-soft-water-bottle
store_origin: TN
region: Tunisia
---

# Collapsible design shrinks as you drink 350ml capacity for optimal hydration Ultra-lightweight at just 0.03 kg FITLY Soft Flask - Shrink As You Drink Soft Water Bottle for Hydration Pack - Folding Water Bottle Ideal for Running, Hiking, Cycling, Climbing & Rigorous Activity

**Brand:** fitly
**Price:** 109.44 DT
**Availability:** ✅ In Stock

## Summary

> 💦 Stay light, stay fast, stay hydrated — the flask that moves with you!

## Quick Answers

- **What is this?** FITLY Soft Flask - Shrink As You Drink Soft Water Bottle for Hydration Pack - Folding Water Bottle Ideal for Running, Hiking, Cycling, Climbing & Rigorous Activity by fitly
- **How much does it cost?** 109.44 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/464350954-fitly-soft-flask-shrink-as-you-drink-soft-water-bottle)

## 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

- • **Eco-Conscious & Safe:** Made from BPA & PVC-free thermoplastic polyurethane for reusable, toxin-free hydration.
- • **Pocket-Ready Portability:** Compact, foldable design fits seamlessly into running vests, pockets, or backpacks.
- • **Hydrate Without the Bounce:** Shrinks as you drink to eliminate sloshing and rattling during intense activity.
- • **Intelligent Hydration Control:** Leak-resistant bite valve lets you sip on the go with customizable flow by pressure.
- • **Versatile for Every Adventure:** Perfect for running, hiking, cycling, climbing, and even doubles as a freezable ice pack.

## Overview

The FITLY Soft Flask is a 350ml collapsible water bottle crafted from BPA and PVC-free thermoplastic polyurethane. Designed for active professionals, it shrinks as you drink to prevent sloshing, fits easily into pockets or hydration packs, and weighs just 0.03 kg. Ideal for running, hiking, cycling, and climbing, it features a leak-resistant bite valve and can be frozen to double as an ice pack, making it the ultimate lightweight hydration companion for rigorous outdoor activities.

## Description

FITLY Soft Flask - Shrink As You Drink Soft Water Bottle for Hydration Pack - Folding Water Bottle Ideal for Running, Hiking, Cycling, Climbing & Rigorous Activity

## 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 |
|---------------|-------|
| Brand | FITLY |
| Material | Thermoplastic Polyurethane |
| Bottle Type | Collapsible Bottle |
| Color | Black |
| Capacity | 350 Milliliters |
| Special Feature | Collapsable, Lightweight |
| Product Dimensions | 2.76"W x 8.66"H |
| Product Care Instructions | Hand Wash Only |
| Model Name | F3B |
| Recommended Uses For Product | Climbing, Cycling, Hiking |
| Number of Items | 1 |
| Theme | Sport |
| Reusability | Reusable |
| Shape | Round |
| Material Type Free | BPA, PVC Free |
| Style | foldable, lightweight |
| Unit Count | 1.0 Count |
| Package Information | Collapsible |
| Specific Uses For Product | Running, Hiking, Cycling, Skiing, Hydration Pack, Running Vest |
| Manufacturer | FITLY |
| Item Package Dimensions L x W x H | 8.66 x 3.5 x 1.57 inches |
| Package Weight | 0.03 Kilograms |
| Item Dimensions  LxWxH | 2.76 x 2.76 x 4.72 inches |
| Brand Name | FITLY |
| Part Number | F3B |
| Included Components | F3B |
| Size | 12 Ounces |
| Sport Type | Climbing, Cycling, Hiking, Running |

## Product Details

- **Brand:** FITLY
- **Material:** Thermoplastic Polyurethane
- **Bottle Type:** Collapsible Bottle
- **Color:** Black
- **Capacity:** 350 Milliliters

## Images

![FITLY Soft Flask - Shrink As You Drink Soft Water Bottle for Hydration Pack - Folding Water Bottle Ideal for Running, Hiking, Cycling, Climbing & Rigorous Activity - Image 1](https://m.media-amazon.com/images/I/618lbd5zPnL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ AWESOME accessory to enhance my runs and keep me hydrated !!
*by E***. on July 16, 2025*

When I first got into running long distance a few years ago I tried so many iterations of bottles - this by far is my favorite! It’s a solid design, holds just the right amount of water for me and fits in my run vest so I can be hands free, plus it doesn’t break the bank. I’ve also weirdly enough put warmer water in it for winter running! They last a long time - the spout makes the water easy to access and if I don’t bring my vest it’s light and hand sized, making it easy to carry. All in all great functionality. Also their customer service is super friendly and knowledgeable! Rare to have a person on the line AND one who’s friendly.

### ⭐⭐⭐⭐⭐ Easy to use soft flask for running!
*by S***R on August 30, 2025*

This handheld soft flask is great and easy to carry with me on my runs. Easy to use. Has a slight plastic taste at first but I’ve soaked it in hot soapy water and that has helped. The little pocket on the hand held “carrier” works well to hold my keys and a small snack. Wished I’d found it sooner! Good quality. Easy to use and carry!

### ⭐⭐⭐⭐ Perfect, with only one problem.
*by E***B on November 29, 2024*

The size and function of this is just right. But, as others have said, there is a taste/smell that I can't seem to eliminate. I tried vinegar and baking soda, and then tried extended soaks with the same. I managed to decrease the taste and smell somewhat. The flask is so portable and well-designed that I just use it and try to overlook the taste.

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**Shop now:** [https://www.desertcart.tn/products/464350954-fitly-soft-flask-shrink-as-you-drink-soft-water-bottle](https://www.desertcart.tn/products/464350954-fitly-soft-flask-shrink-as-you-drink-soft-water-bottle)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-01*