---
product_id: 458948347
title: "- HydraPak UltraFlask Speed (500ml or 600ml) - Collapsible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap"
brand: "hydrapak"
price: "€ 76.77"
currency: EUR
in_stock: true
reviews_count: 13
category: "Hydra Pak"
url: https://www.desertcart.hr/products/458948347-hydrapak-ultraflask-speed-500ml-or-600ml-collapsible-soft-flask-water
store_origin: HR
region: Croatia
---

# one-motion SpeedFill cap 600ml collapsible capacity bounce-free, vest-compatible fit - HydraPak UltraFlask Speed (500ml or 600ml) - Collapsible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap

**Brand:** hydrapak
**Price:** € 76.77
**Availability:** ✅ In Stock

## Summary

> 💦 Stay fast, stay fueled, stay ahead with UltraFlask Speed!

## Quick Answers

- **What is this?** - HydraPak UltraFlask Speed (500ml or 600ml) - Collapsible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap by hydrapak
- **How much does it cost?** € 76.77 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/458948347-hydrapak-ultraflask-speed-500ml-or-600ml-collapsible-soft-flask-water)

## 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

- • **Refill in a flash:** SpeedFill cap with one-motion pop-open tab lets you hydrate quickly at aid stations without missing a beat.
- • **Custom sip, your way:** 42mm customizable cap offers choice between straw or bite valve for effortless hydration on the go.
- • **Adventure-proof guarantee:** Backed by a beyond lifetime warranty—repair or replace free to keep you moving forward.
- • **Lightweight & pack-friendly:** At just 84 grams, fits seamlessly into most hydration vests and running packs for zero bulk.
- • **Hydration that moves with you:** Soft, collapsible TPU flask shrinks as you drink, eliminating bounce and chafing during runs.

## Overview

The HydraPak UltraFlask Speed is a 600ml collapsible soft flask designed for runners and outdoor enthusiasts. Its lightweight, bounce-free design fits most hydration vests and packs, featuring a quick one-motion SpeedFill cap and customizable straw or bite valve. Durable TPU construction and a beyond lifetime warranty ensure reliable hydration on every adventure.

## Description

desertcart.com : HydraPak UltraFlask Speed (500ml or 600ml) - Collapsible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap : Sports & Outdoors

Review: Exact same as the Outdoor Vitals Skyline 30 ones - 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: Great for trail runs - These UltraFlask Speed bottles are excellent for trail running and longer training sessions. They fit perfectly into most running vest pockets, and the soft design means they conform to your body without bouncing or poking like traditional hard bottles. The bite valve works smoothly with a good flow rate, and the extended straw makes it easy to sip without removing the bottle from the vest — great when you don’t want to break stride. I also appreciate that the straw can be removed if you prefer a lower profile setup. As you drink, the bottle compresses to reduce sloshing and becomes lighter, which is especially helpful later into a run. They’re also simple to clean and dry, and the wide opening makes adding ice or electrolytes easy. Durable, lightweight, and very comfortable to carry — highly recommended for anyone running with a hydration vest or needing compact hydration on the go.

## Features

- HYDRATION VEST COMPATIBLE: Fits easily in most hydration vests, belts or pack pockets. Provides bounce-free stability and a flexible flask shoulder to prevent chafing.
- COLLAPSIBLE FLASK: Soft material conforms to any pocket, and shrinks as you drink to reduce movement and pack away easily when empty.
- PERFECT FOR AID STATIONS: UltraFlasks are equipped with our SpeedFill Cap designed for quick and easy refilling at aid stations. A side tab pops open the cap in one motion and snaps shut with a click.
- CUSTOMIZABLE CAP: Built for versatility, the UltraFlask comes with a 42mm customizable cap. Choose between straw or bite valve.
- BEYOND LIFETIME WARRANTY: If you experience any issue, we’ll repair or replace the item for free. Whatever it takes to keep your adventure going.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09S8SMLRY |
| Best Sellers Rank | #4,855 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #215 in Water Bottles |
| Bottle Type | Collapsible Water Bottle |
| Brand | HydraPak |
| Brand Name | HydraPak |
| Capacity | 600 Milliliters |
| Color | Malibu Blue |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,579) |
| Date First Available | February 11, 2022 |
| Finish Type | Glossy |
| Included Components | 2 Pieces Collapsible 600ml SoftFlask, Cap and Straw |
| Item Dimensions LxWxH | 3.2 x 3.2 x 7.3 inches |
| Item Package Dimensions L x W x H | 9.02 x 8.39 x 3.07 inches |
| Item Weight | 84 Grams |
| Manufacturer | HydraPak |
| Material | TPU, PP/POM, Silicone |
| Model Name | UltraFlask Speed 600ml |
| Number of Items | 2 |
| Package Information | Soft Bottle |
| Package Weight | 0.43 Kilograms |
| Part Number | 834456002918 |
| Product Care Instructions | Hand Wash Only |
| Product Dimensions | 3.2"W x 7.3"H |
| Recommended Uses For Product | Running |
| Reusability | Reusable |
| Shape | Round |
| Size | 600ml Speed - 2 Pack |
| Special Feature | Collapsable, Straw |
| Sport Type | Climbing, Exercise & Fitness, Running, Track & Field, Walking |
| Style | 600ml - 2 Pack - With Drink Straw |
| Suggested Users | Unisex-Adult |
| Theme | Lightweight hydration for sports or outdoor activities |
| UPC | 834456002918 |
| Unit Count | 2.0 Count |
| Warranty Description | Lifetime |

## Product Details

- **Bottle Type:** Collapsible Water Bottle
- **Brand:** HydraPak
- **Capacity:** 600 Milliliters
- **Color:** Malibu Blue
- **Material:** TPU, PP/POM, Silicone

## Images

![- HydraPak UltraFlask Speed (500ml or 600ml) - Collapsible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap - Image 1](https://m.media-amazon.com/images/I/61xgCTHYMoL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Exact same as the Outdoor Vitals Skyline 30 ones
*by R***N on August 29, 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

### ⭐⭐⭐⭐⭐ Great for trail runs
*by W***T on October 29, 2025*

These UltraFlask Speed bottles are excellent for trail running and longer training sessions. They fit perfectly into most running vest pockets, and the soft design means they conform to your body without bouncing or poking like traditional hard bottles. The bite valve works smoothly with a good flow rate, and the extended straw makes it easy to sip without removing the bottle from the vest — great when you don’t want to break stride. I also appreciate that the straw can be removed if you prefer a lower profile setup. As you drink, the bottle compresses to reduce sloshing and becomes lighter, which is especially helpful later into a run. They’re also simple to clean and dry, and the wide opening makes adding ice or electrolytes easy. Durable, lightweight, and very comfortable to carry — highly recommended for anyone running with a hydration vest or needing compact hydration on the go.

### ⭐⭐⭐⭐⭐ Good quality
*by L***I on May 23, 2025*

Great addition to son's collection and they were used in the cocodona 250. Perfect size, sturdy product and worked well for the race.

## 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

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**Shop now:** [https://www.desertcart.hr/products/458948347-hydrapak-ultraflask-speed-500ml-or-600ml-collapsible-soft-flask-water](https://www.desertcart.hr/products/458948347-hydrapak-ultraflask-speed-500ml-or-600ml-collapsible-soft-flask-water)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-25*