--- product_id: 412120405 title: "UltraFlask Speed 500 ml Pack of 2 - Collapsible Water Bottle for Hydration Vests and Running Backpacks with Easy Open Cap (500 ml), Malibu Blue" brand: "hydrapak" price: "VT20571" currency: VUV in_stock: true reviews_count: 5 category: "Hydra Pak" url: https://www.desertcart.vu/products/412120405-ultraflask-speed-500-ml-pack-of-2-collapsible-water-bottle store_origin: VU region: Vanuatu --- # SpeedFill quick-open cap Fits most hydration vests & packs 500 ml collapsible capacity UltraFlask Speed 500 ml Pack of 2 - Collapsible Water Bottle for Hydration Vests and Running Backpacks with Easy Open Cap (500 ml), Malibu Blue **Brand:** hydrapak **Price:** VT20571 **Availability:** ✅ In Stock ## Summary > 💦 Stay hydrated, stay ahead — the flask that moves with you! ## Quick Answers - **What is this?** UltraFlask Speed 500 ml Pack of 2 - Collapsible Water Bottle for Hydration Vests and Running Backpacks with Easy Open Cap (500 ml), Malibu Blue by hydrapak - **How much does it cost?** VT20571 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/412120405-ultraflask-speed-500-ml-pack-of-2-collapsible-water-bottle) ## Best For - hydrapak enthusiasts ## Why This Product - Trusted hydrapak brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seamless Compatibility:** Designed to fit snugly in hydration vests, belts, and running backpacks without friction. - • **Ultra-Light & Collapsible:** Shrinks as you drink to reduce bounce and save space in your pack. - • **Customizable Valve Options:** Choose between straw or bite valve for effortless sipping on the move. - • **Lifetime Adventure Guarantee:** Backed by a repair or replacement promise to keep you fueled on every trail. - • **SpeedFill Cap for Rapid Refills:** One-click open/close design perfect for fast hydration at aid stations. ## Overview The Hydrapak UltraFlask Speed 500 ml is an ultra-light, collapsible water bottle engineered for runners and outdoor enthusiasts. Featuring a quick-access SpeedFill cap and customizable valve options, it fits seamlessly into hydration vests and backpacks, minimizing bounce and maximizing convenience. Made from durable, BPA-free materials and backed by a lifetime warranty, it’s the ultimate hydration companion for fast-paced adventures. ## Description As part of our ultra-light range, the 600ml bottle is so light that you may forget you have it with you. Weighing just over 500 ml, it offers optimal hydration, no matter what type of runner you are. The soft material adapts to most bags and shrinks when drinking to minimise water movement. The SpeedFill closure allows for quick refills at supply stations and can be used with or without a hose. Ultra-light, ultra-useful. Included in the package: UltraFlask 500 ml drinking bottle SpeedFill cap drinking tube bite valve Basic care and instructions for use Specifications: Capacity: 600 ml / 20 fl oz Weight: 46 g / 1.6 oz Dimensions: 186 mm x 81 mm / 7.3 in x 2.3 in Material: TPU, PP, silicone, POM Review: It’s solid and the best ones on the market. I have zero idea how I can even complain about it but it does exactly as advertised and don’t notice anything wrong with them. Bought them for my outdoor vitals skyline 30 since I lost one due to tsa. But for what it is I love them. I don’t have any leaks, stores flawless in several running vest I own and two different backpacks, it’s easy to carry and no funky taste and they are easy to clean so I don’t mind putting in some tablets in them even if trailrunning a two day trip. Plus I love the straws so it’s right by my face so I don’t even need to reach and drink instead I just turn my head and bite the valve and drink. It’s just all around a good design Review: Os flasks são de muito boa qualidade. Já os usei em treino e competição. A abertura rápida dá jeito para abastecimentos e agora uso sempre os extensores porque me dá mais jeito. ## Features - COMPATIBLE WITH DRINKING SPORTS VESTS: Fits easily into most hydration vests, belts or backpack bags. Provides stability and a flexible bottle shoulder to avoid friction. - Collapsible bottle: the soft material adapts to any bag and shrinks when drinking to reduce movement and easy to fold after emptying. - PERFECT FOR HELP STATIONS: UltraFlasks are equipped with our SpeedFill cap, designed for quick and easy refilling at auxiliary stations. A side tab opens the cap with one movement and is closed with one click. - CUSTOMIZABLE CAP The UltraFlask comes with a customizable 42mm cap for versatility. Choose between straw or bite valve. - BEYOND THE LIFETIME WARRANTY: If you have any problem, we will repair or replace the item for free. Whatever it takes to keep your adventure going. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09S8RZB94 | | Additional Features | Carrying Loop, Flip Top, Lightweight | | Age Range Description | Any Age Group | | Best Sellers Rank | #66,844 in Sporting Goods ( See Top 100 in Sporting Goods ) #231 in Cycling Hydration Packs | | Bottle Type | Collapsible water bottle | | Brand Name | HydraPak | | Capacity | 500 Milliliters | | Color | malibu blue | | Container Type | Soft Bottle | | Customer Reviews | 4.6 4.6 out of 5 stars (353) | | Finish Types | Glossy | | Included Components | Bottle+ Straw | | Item Dimensions W x H | 5.1W x 21.6H centimeters | | Item Type Name | Straw | | Item Weight | 84 Grams | | Manufacturer | Hydrapak | | Material Type | Silicone, Thermoplastic Polyurethane | | Material Type Free | BPA Free, BPS Free, PVC Free, BPF Free, DEHP Free | | Model Name | Ultraflask | | Number of Items | 2 | | Product Care Instructions | Hand Wash Only | | Recommended Uses For Product | Running, Hiking, Traveling, Everyday use | | Reusability | Reusable | | Shape | irregular shape | | Sport Type | Running | | Style Name | Modern | | Theme | Hydration Bottle, Athletic | | UPC | 834456002901 | | Unit Count | 1 Count | ## Product Details - **Bottle type:** Collapsible water bottle - **Brand:** HydraPak - **Capacity:** 500 Milliliters - **Colour:** malibu blue - **Material:** Silicone, Thermoplastic Polyurethane ## Images ![UltraFlask Speed 500 ml Pack of 2 - Collapsible Water Bottle for Hydration Vests and Running Backpacks with Easy Open Cap (500 ml), Malibu Blue - Image 1](https://m.media-amazon.com/images/I/6143Thp1XTL.jpg) ## Questions & Answers **Q: I have a bunch of these but they tend to get a bit slimy inside. What is the best way to clean them?** A: We suggest using Bottle Bright to help clean your soft flask. https://www.amazon.com/Bottle-Bright-Tablets-Biodegradable-Hydration/dp/B06XYCVDB9/ref=sr_1_4?hvadid=616928149387&hvdev=c&hvlocphy=9028880&hvnetw=g&hvqmt=e&hvrand=2863089430132798370&hvtargid=kwd-12313741154&hydadcr=9377_13604253&keywords=bottle+bright&qid=1693921708&sr=8-4 **Q: Will they take a Katadyn BeFree filter?** A: Haven't tried putting the filter in, but I carry the BeFree collapsable water filter and flask with me on most of my runs, hikes, and long gravel rides. It folds up easy and weighs nothing. I have been doing this for years. Very fortunate to live in Washington where there is clean, clear water on most of the trails & mountain gravel roads up here. **Q: osprey duro 15, will it fit the front pockets?** A: Hi there! Our flasks and reservoirs will fit most running vests. Please see below dimensions and compare to that of your running vest to see if they are compatible. Dimensions: 7.3 x 2.3 in ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by R***N on 29 August 2025* It’s solid and the best ones on the market. I have zero idea how I can even complain about it but it does exactly as advertised and don’t notice anything wrong with them. Bought them for my outdoor vitals skyline 30 since I lost one due to tsa. But for what it is I love them. I don’t have any leaks, stores flawless in several running vest I own and two different backpacks, it’s easy to carry and no funky taste and they are easy to clean so I don’t mind putting in some tablets in them even if trailrunning a two day trip. Plus I love the straws so it’s right by my face so I don’t even need to reach and drink instead I just turn my head and bite the valve and drink. It’s just all around a good design ### ⭐⭐⭐⭐⭐ Review *by C***S on 24 July 2024* Os flasks são de muito boa qualidade. Já os usei em treino e competição. A abertura rápida dá jeito para abastecimentos e agora uso sempre os extensores porque me dá mais jeito. ### ⭐⭐⭐⭐⭐ Review *by Z***E on 18 May 2025* Works well, as advertised ## Frequently Bought Together - HydraPak UltraFlask Speed (500ml or 600ml) - Collapsible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap - HydraPak Velocity Hydration Reservoir (1.5L or 2L), Slim Profile Water Bladder, Self-Sealing Bite Valve, Leak Proof, Reversible, Dishwasher Safe - HydraPak Velocity IT (1.5L or 2L Hydration Reservoir) - Insulated Water Bladder/Reservoir for Hydration Pack – Self-Sealing Bite Valve, Leak Proof and Dishwasher Safe --- ## 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.vu/products/412120405-ultraflask-speed-500-ml-pack-of-2-collapsible-water-bottle](https://www.desertcart.vu/products/412120405-ultraflask-speed-500-ml-pack-of-2-collapsible-water-bottle) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-04*