UltrAspire  UltraFlask 550 Hybrid Water Bottle

$14.95

With the benefits of a soft flask and the conveniences of a hard bottle, the UltrAspire UltraFlask 550 Hybrid bottle sits close to your body to minimize movement and is squeezable for quick hydration.

Color: Pearl
Quantity

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Features

  • Large cap opening easily fits ice cubes and is covered by a high-flow push/pull valve
  • Bottle body is very squeezable and has a quick recharge
  • Bottle is soft and comfortable against the body
  • Made with low-density, food-grade polyethylene plastic
  • Hand wash; it is not recommended for dishwasher use

Made in USA.

View all UltrAspire Running Water Bottles

Technical Specs

Best Use

Running

Liquid Capacity (L)

0.55 liters

Liquid Capacity (fl. oz.)

18.6 fluid ounces

Dimensions

8.25 x 3.75 x 2 inches

Water Bottle Material

Plastic

Material(s)

Plastic

BPA Free

Yes

Bottle Opening

Narrow

Cap Type

Screw Cap

Weight

1.7 ounces

Reviews
21 reviews with an average rating of 4.4 out of 5 stars

Ratings Snapshot

Product Rating

16 out of 17 (94%) reviewers recommend this product

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Thom I
Bend OR
Rated 5.0 out of 5 stars

When you need a tiny bit of (extra) water.

2 years ago

This is a very handy water bottle when you need to carry a bit of water, or extra water. Fits in a middle pocket of a cycling jersey perfectly, or tosses nicely into a tiny or large pack. The shape and squishy form is easy to handle but rests nicely on your back. Cap works well. I was looking at the flat water bags I have used before, but they quickly develop leaks and are too floppy to handle easily. This bottle even fits in a car drink holder. Just a half liter, but combine that with a bike water bottle and it can make the difference you need on a hot day or longer ride. Very short day hikes in our High Desert location still need a dash of water along and this half liter is sometimes all you need. Highly recommended.

Height:5'9"
Age:65–74
Weight:150–175 lbs.
Yes , I recommend this product
Helpful?
dtiskevics
Seattle, WA
Rated 2.0 out of 5 stars

Great bottle, faulty cap

2 years ago

I bought two of these bottles and after only a few uses, both of the caps started leaking from the mouthpice very badly at the slightest amount of pressure or inversion. Other than that the bottles are great. According to all the other reviews the caps are fine so I must have gotten a bad batch.

Height:6'5"
Age:25–34
Weight:200–225 lbs.
Helpful?
Bigfoot15
Littleton, Colorado
Rated 5.0 out of 5 stars

Excellent Design.

3 years ago

Only water bottle I’ve own that works with my body. Contours with the body whether it be on your chest or hips. The bottle does not absorb strange tastes and it is dishwasher safe. Lid does not leak. Best water bottle I’ve used in the past 20 years of running.

Height:6'5"
Age:45–54
Weight:175–200 lbs.
Yes , I recommend this product
Helpful?
GD99
SF bay area, ca
Rated 5.0 out of 5 stars

Great bottle for the trails

2 years ago

I love the UltraSpire 550 water bottle. I have quite a few of them. They count our and feel nice against your body in my UltraSpire Alpha or Zygos vest. I couldn't be happier and they last a very long time.

Height:5'7"
Age:45–54
Weight:150–175 lbs.
Yes , I recommend this product
Helpful?
Westernease
Where the Wind Blows
Rated 5.0 out of 5 stars

a bottle that is more than a bottle

3 years ago

So I have about six of these bottles. How Can a bottle be more than a bottle? This functions as it states, as a bottle. For me though it works amazingly well. There is just enough softness with the bottle, that a slight squeeze will let the water flow with ease. There is also enough rigidity to this bottle that I can take a beating and still hold its form. So for getting a drink while on the move, there really isn’t a bottle that is any better.

Height:6'1"
Age:45–54
Weight:175–200 lbs.
Yes , I recommend this product
Helpful?
Akent
Hawaii
Rated 5.0 out of 5 stars

Does the job

3 years ago

I have more of these than I care to admit. Works perfectly across the Ultraspire collection of belts and vests. I use it with the Nucleus, Legacy pack, and Plexus. Doesn’t leak, easy to clean, easy to drink. Checks all the boxes.

Height:5'6"
Age:35–44
Weight:150–175 lbs.
Yes , I recommend this product
Helpful?
VinnyRuns
Freeville NY
Rated 3.0 out of 5 stars

Silence is golden

2 years ago

These bottles are amazing. Not sure what sort of sorcery is used on them but the sloshing is minimal and I've run hundreds of miles with them and barely notice it.

Height:5'11"
Age:35–44
Weight:175–200 lbs.
Yes , I recommend this product
Helpful?
MO WEST
Paducah Ky.
Rated 5.0 out of 5 stars

Best Ever

3 years ago

Been using these bottles since they came out I love the shape easy to hold onto while running on trails.

Height:5'10"
Age:55–64
Weight:150–175 lbs.
Yes , I recommend this product
Helpful?
Runidaho
Idaho
Rated 5.0 out of 5 stars

Perfect vest companion

1 year ago

This bottle does what it is made to do. They fit perfect in most of the UltrAspire vest and waist pack line. I almost left a 4 due to there always being a bit of a leak issue on the nipple, but that is easily solved if ya give it a good hand slap. Sloshing sound is no issue. I don't know how, but I never notice it. They also offer a the straw lids that I like alot.

Height:5'10"
Age:35–44
Weight:175–200 lbs.
Yes , I recommend this product
Helpful?
John from MA
Westfield, MA
Rated 5.0 out of 5 stars

best bottles

2 years ago

I have a ton of these bottles. They are the absolute best. Softer than a hard plastic bottle but more firm than a soft flask. I really don’t want a hydration vest unless it can fit these bottles. I also have the Ultraspire 550 handheld that fits one of these bottles. They are very ergonomic and comfortable to carry

Height:5'9"
Age:45–54
Weight:175–200 lbs.
Yes , I recommend this product
Helpful?
1 - 10 of 21 Reviews

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