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HydraPak UltraFlask Speed (500ml or 600ml) – Collapsible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap

HydraPak UltraFlask Speed (500ml or 600ml) - Collapsible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap - Image 2

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HydraPak UltraFlask Speed (500ml or 600ml) - Collapsible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap - Image 3

HydraPak UltraFlask Speed (500ml or 600ml) - Collapsible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap - Image 4

HydraPak UltraFlask Speed (500ml or 600ml) – Collapsible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap

Name: HydraPak UltraFlask Speed (500ml or 600ml) - Collapsible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap - urbantumblers
Price: 11.83 USD
Availability: InStock

Original price was: $24.00.Current price is: $11.83.

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Reviews (0)

Description

Price: ~~$24.00~~ - $11.83
(as of Jan 28, 2026 01:49:30 UTC – Details)

To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.Learn more how customers reviews work on Amazon

Customers say

Customers find this hydration bottle to be of high quality, easy to clean, and convenient to drink from on the go. It fits well in hydration vests and front pockets, and is particularly suitable for backpacking. While some customers report it doesn't leak at all, others mention it leaks everywhere, and durability experiences are mixed, with some reporting it holds up well while others noting holes after three uses.

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59 customers mention quality, 51 positive, 8 negative

Customers find the water bottle to be of good quality, better than expected, with one customer noting it performs better than a hard plastic bottle.

Product had a plastic taste which went away after a few uses. Seems high quality, no leaks even after a nun tablet blew it up with gas.Read more

Great bottles, my husband has used the smaller ones. Bought these and they don’t fit in the Salomon vest FYI.Read more

Good productRead more

Great product….even the long tubes are a little short….Read more

39 customers mention functionality, 35 positive, 4 negative

Customers find that the water bottle works well, with one customer noting that the pop top enclosures are great for refueling during races, and another reporting no issues even after 100 miles of use.

Straw could be longer but works great. Love that it collapses reducing weight. Easy to stash.Read more

…These worked great, held water well, and were easy to refill at aid stations.Read more

I use these with a running vest, they function well but sometimes I pull the plastic bite top off….Read more

…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…Read more

32 customers mention fit, 31 positive, 1 negative

Customers like how the water bottle fits, mentioning it works well in hydration vests and front pockets, with one customer noting it's moldable to accommodate different sizes.

Great soft side water bottle…Fits nicely and can squeeze Into many pockets…The bite top makes it easy to not deal with taking tops on and off……Read more

…The rate of flow is very good, and they fit well in my running vest.Read more

…my reservoir bladder, I'll use these and they happen to fit perfectly in the front pockets of my running vest – see image….Read more

Idea is great because it fits perfectly in my pack but it leaks out all the water if it gets flipped upside down….Read more

32 customers mention hydration capacity, 28 positive, 4 negative

Customers praise the hydration capacity of the bottle, finding it perfect for backpacking and trail running, with one customer noting it encourages drinking more during outdoor activities.

Great hydration system. Easy to fill and drink on the move. Collapse as they drain. Easy to dry afterwards.Read more

…These worked great, held water well, and were easy to refill at aid stations.Read more

Perfect for shorter runs or putting it in my vest and using them for the long run days.Read more

Best hydration bladder on the market.Read more

31 customers mention ease of use, 29 positive, 2 negative

Customers find the water bottle easy to fill and drink from on the go, with one customer specifically mentioning that the bite valve is user-friendly.

I wanted to find easy to use, collapsible bottles that I could put in side pockets for long distance (marathon) running….Read more

Soft, no leak, easy to drink, zero chemical taste or smellRead more

…I just wish I could get them in 1 liter size. Easy to fill, easy to drink from.Read more

…These wash out and dry easily. They are easy to fill and drink from.Read more

25 customers mention ease of cleaning, 22 positive, 3 negative

Customers find the water bottle easy to clean and dry afterwards.

…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…Read more

…keeps the water slosh down to a minimum. easy to clean and use. would recommendRead more

…These were super easy to clean and really easy to refill on my marathon runs since most of the organizers are encouraging people to care refill…Read more

…perfectly, but the straws were the right length and they are really easy to clean….Read more

49 customers mention leak resistance, 24 positive, 25 negative

Customers have mixed experiences with the water bottle's leak resistance, with some reporting it doesn't leak at all while others mention it leaks everywhere.

…Very disappointed. UPDATE: Dropping to 1 star because they also leaked everywhere even though the top was firmly in place. Complete waste of money.Read more

…end does not need to be opened or closed, just bite down, and it does not leak when you bend over to tie a shoe.Read more

…it with water and firmly screwed the lid, but nevertheless, it leaked all over my bag.Read more

Purchased these for use in a 40 mile trail ultra. I had no leaks and no issue during the entire event….Read more

35 customers mention durability, 19 positive, 16 negative

Customers have mixed experiences with the water bottle's durability: some report it holds up well, while others mention it develops holes after three uses.

…Durable, lightweight, and very comfortable to carry — highly recommended for anyone running with a hydration vest or needing compact hydration on…Read more

Had a small hole in it the first time I filled it up. I do not believe I could have made the hole. Bummed. I'd try another….Read more

Flip top makes refills at aid stations a breeze. So far appears very durable. Fits in my Salomon ADV Skin 12 better than the 500ml originalsRead more

First one I order had a small pinhole in the bottom. Returned through amazon and got another that was all good….Read more

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Top reviews from the United States

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Roman Livingston
Exact same as the Outdoor Vitals Skyline 30 ones
Reviewed in the United States on August 29, 2025
Style: 500ml – 2 Pack – With Drink StrawsVerified Purchase
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
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2 people found this helpful

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Whit
Great for trail runs
Reviewed in the United States on October 29, 2025
Style: 500ml Speed – 2 Pack – Without Drink StrawVerified Purchase
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.
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lori
Good quality
Reviewed in the United States on May 23, 2025
Style: 600ml – 2 Pack – With Drink StrawVerified Purchase
Great addition to son's collection and they were used in the cocodona 250. Perfect size, sturdy product and worked well for the race.
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One person found this helpful

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Stephen C
High quality flask
Reviewed in the United States on December 27, 2025
Style: 500ml Speed – Without Drink StrawVerified Purchase
A very good flask that does not leak.
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Joey
Amazing for trail race
Reviewed in the United States on June 17, 2025
Style: 600ml – 2 Pack – With Drink StrawVerified Purchase
One race in, and I'm in love. I have that common salomon vest, and had to replace the hydrapaks. These are bigger than what I had but still fit. Running with the straws was a mixed bag – I'm still working on the best way to keep them from bouncing around while also not being pressured to my neck. The access for a quick drinky drink was amazing. These also feel thicker than the Salomon version that came with my vest. These are worth the upgrade – though, I haven't tried other brands for a true comparison.
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6 people found this helpful

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Roxanne Powell
Fantastic Addition to My Running Kit
Reviewed in the United States on October 7, 2025
Style: 500ml – With Drink StrawVerified Purchase
I bought this to help identify my electrolyte flask from my water flask during a long run and it's great! You have to press down firmly to make sure the lid is locked on, but once you do it doesn't leak and stays put! It's roughly the same size as the flasks that came with my hydration vest, so I can keep track of my hydration levels easily. When not in use, I can roll it up for easy storage.
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One person found this helpful

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T.P.
Really love these ultra flasks- adaptive
Reviewed in the United States on October 12, 2024
Style: 600ml – 2 Pack – With Drink StrawVerified Purchase
I am an ultra runner and have just started adding these soft flasks to my packs for longer runs to hold electrolytes or other liquid fuel so I can keep my water bladder with just water. I like how they collapse with use so you are left with a lightweight small footprint of a product. Super easy to refill with the hinged lid (SO much better than trying to fill a smaller spout area). I love that the mouthpieces are interchangeable. I really like the straw but my current running vest sits too high to use the straws and they keep bouncing into my jaw or side of my face, so I am just using the mouthpiece. They are easy to clean, have no odor or taste, and made of quality material. I highly recommend over others on the market
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8 people found this helpful

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Amazon Customer
WRONG IN SO MANY WAYS.
Reviewed in the United States on November 6, 2025
Style: 600ml – 2 Pack – With Drink StrawVerified Purchase
I have been using HydraPak bottles for over a decade. The bottles used to be made out of pvc type materials, lids had a gasket that if not mindful of you could loose. After a couple years of regular use the seam would eventually spring a leak and the bottle was done. Honestly they function well and NEVER tasted funky. These new silicone or whatever they are taste beyond horrible, the flip cap is a pain and the way the cap is threaded, the hinge is always pushed into you. The worst is the stupid hinge wears a hole in whatever you’re using it with. I use Bottle Bright cleaning tablets regularly, wash after every use and use filtered water…..this is not a product of operator error. I love the collapsible bottles but will explore different brands.
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5 people found this helpful

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Top reviews from other countries

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Manuel Steiner
Perfekt für schnelle Trailläufer
Reviewed in Germany on January 27, 2024
Style: 500ml – With Drink StrawVerified Purchase
Ich nutze die Flasks bei Trailrunning Wettkämpfen, bei denen es an den Verpflegungsstellen schnell gehen muss. Durch den Clip-Verschluss fällt das auf und zu schrauben weg und ermöglicht dadurch ein deutlich schnelleres nachfüllen. Die Flasche hält dicht und läuft auch in einem Laufrucksack nicht aus. Die Flasks haben ähnliche Maße wie die Salomon Flasks und passen in alle Salomon Rucksäcke, andere Laufrucksäcke weiß ich nicht genau.
Natürlich ist die Flask nicht nur für schnelle/ambitionierte Läufer geeignet sondern auch für Leute die es gerne einfach haben. Jedoch würde ich schon sagen, dass der Hauptvorteil beim schnellen nachfüllen liegt.
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Bongobongoking
Works perfectly
Reviewed in the United Kingdom on July 16, 2025
Style: 600ml – 2 Pack – With Drink StrawVerified Purchase
Great for long runs. Doesn't leak and super easy to refill
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jonathon knight
Perfect inov8 replacement tubes
Reviewed in the United Kingdom on October 18, 2021
Verified Purchase
I had an inov8 vest and somehow lost the part of the hydration pack that goes in your mouth. I think it’s called the bite. These are a perfect replacement and what inov8 uses. Only thing is they are a different colour and cost a lot if your just after the mouth piece
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DC
Backpacking
Reviewed in Sweden on August 17, 2023
Style: 500ml – With Drink StrawVerified Purchase
Use it in the shoulder pouches of an Atompacks 55 liter pack. Easy hydration on the move without having to pause to reach back for a bottle in a side pocket, which ensures constant and consistent replenishing of fluids. Large opening works well for pouring electrolyte powders. Simple to refill with a BeFree water filter. Recommend for simplicity on the trail.
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Christine Gomes
Exactamente o que pretendia
Reviewed in Spain on July 24, 2024
Style: 500ml – 2 Pack – With Drink StrawsVerified Purchase
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.
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