--- product_id: 561944192 title: "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: "4294 kr" currency: ISK in_stock: true reviews_count: 8 category: "Fitly" url: https://www.desertcart.is/products/561944192-soft-flask-shrink-as-you-drink-soft-water-bottle-hydration store_origin: IS region: Iceland --- # Shrinks as you drink - no bounce, no slosh 400ml capacity - just right hydration Ultra-lightweight & foldable - carry anywhere 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:** 4294 kr **Availability:** ✅ In Stock ## Summary > 💦 Stay hydrated, stay ahead — the flask that moves with you! ## Quick Answers - **What is this?** 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?** 4294 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/561944192-soft-flask-shrink-as-you-drink-soft-water-bottle-hydration) ## 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 guilt-free, reusable hydration. - • **Versatile for all seasons:** Freezable design doubles as an ice pack to keep your drink cool or warm during winter runs. - • **Ergonomic & leak-resistant:** Intelligent bite valve and flexible shape fit comfortably in hand and running vests. - • **Compact & collapsible design:** Folds down to pocket size, perfect for runners, hikers, and cyclists on the go. - • **Hydration that adapts to you:** Shrinks as you drink to eliminate bounce and slosh, keeping you light and focused. ## Overview The FITLY Soft Flask is a 400ml collapsible water bottle designed for active professionals who demand lightweight, space-saving hydration. Made from BPA & PVC-free thermoplastic polyurethane, it shrinks as you drink to prevent sloshing and bounce, fitting seamlessly into running vests or pockets. Its leak-resistant bite valve and foldable design make it ideal for running, hiking, cycling, and climbing, while its freezable feature doubles as an ice pack for versatile use year-round. ## Description desertcart.com : FITLY Soft Flask - 13.5 oz (400 ml) - Shrink As You Drink Pocket Soft Water Bottle for Hydration Pack/Running Vest- Folding Water Bottle for Running, Hiking, Cycling - Ski Water Bottles (FLASK400) : Sports & Outdoors Review: AWESOME accessory to enhance my runs and keep me hydrated !! - 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. Review: Easy to use soft flask for running! - 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! ## 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 | B0BBG713HW | | Additional Features | Folding,Lightweight,Valve | | Age Range Description | Adult | | Best Sellers Rank | #1,247 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #3 in Camping & Hiking Hydration Flasks | | Bottle Type | Collapsible Bottle | | Brand | FITLY | | Brand Name | FITLY | | Capacity | 400 Milliliters | | Color | Black | | Container Type | Bottle | | Customer Reviews | 4.2 out of 5 stars 3,470 Reviews | | Global Trade Identification Number | 07432112146117 | | Included Components | F4B | | Item Dimensions W x H | 2.76"W x 7.87"H | | Item Height | 7.87 inches | | Manufacturer | FITLY | | Material | Thermoplastic Polyurethane | | Material Type | Thermoplastic Polyurethane | | Material Type Free | BPA & PVC Free | | Model Name | F4B | | Number of Items | 1 | | Product Care Instructions | Hand Wash Only | | Recommended Uses For Product | Climbing, Cycling, Running | | Reusability | Reusable | | Shape | Round | | Special Feature | Folding,Lightweight,Valve | | Sport Type | Climbing, Cycling, Hiking, Running | | Style Name | sporty | | Theme | Sport | | Unit Count | 1.0 Count | ## Product Details - **Bottle Type:** Collapsible Bottle - **Brand:** FITLY - **Capacity:** 400 Milliliters - **Color:** Black - **Material:** Thermoplastic Polyurethane ## Images ![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/61erFH-8JsL.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! ### ⭐⭐⭐⭐ So far this is a love/hate thing *by W***Y on May 29, 2024* Update on this, the seller reached out and was very interested in what was going on, great customer support for that. The reason for the 4 stars is because this still feels loose in my hand. When the bottle goes down, i still flip it around and have to hand grip it. No matter what I try. Here's where Im at with this. I LOVE the idea of the smaller water bottle in your hand and not carrying some oversized jug. However..... * When the bottle gets low, you have to switch it from above your hand to inside, if not you wont be able to get the rest of the water out. * The wrist strap should be able to tie closer to your hand. Its very loose when again the water bottle is not full. I find it slipping and have to keep my hand clenched so it wont slip off. * The drinking method does take a minute to get use to, its not just sucking water. You have to bite and pinch the end to get the water to come out. Overall its a much better mouse trap thats for sure. But there are some things that could be refined for sure. ## 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 - Fitgriff® Running Belt for Men & Women - Secure Jogging Pouch for Phone, Keys & Essentials - For All Cell Phones - FlipBelt Classic Running Belt, Running Fanny Pack for Women and Men, USA Company --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.is/products/561944192-soft-flask-shrink-as-you-drink-soft-water-bottle-hydration](https://www.desertcart.is/products/561944192-soft-flask-shrink-as-you-drink-soft-water-bottle-hydration) --- *Product available on Desertcart Iceland* *Store origin: IS* *Last updated: 2026-04-28*