UltrAspire UltraFlask 550 Hybrid Water Bottle
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.
- 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| 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 |
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Good product, but a little pricy.
This is a pretty basic bottle with a small-ish opening where the cap with push/pull valve screws off. Pros: - The bottle has rounded edges that make it more comfortable in a vest. - The valve (at least now, when it is new) seals well. No leaking. Cons: - The small opening is going to limit the size of ice cubes. A cube from my automatic fridge/freezer ice maker barely fits through the opening. If you buy ice in a bag, those cubes are going to be too large. You could always put a bottle with water in the freezer and then take it out when it is slushy, but you can't put the bottle in the freezer the night before or it will be frozen solid. For a morning summer run, that becomes kind of a pain because you have to get the bottle in well before you go running. - At $14.95 a bottle (and most people are going to probably have two bottles), it is a little pricy.
Perfect vest companion
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.
Don’t buy
The plastic smell is terrible. There is no recycling symbol on the bottom, so no way to determine if the plastic is safe for humans.
Great Bottle!
The UltraFlask 550 bottles is fantastic. I love the soft feel and the shape of this bottle. No pressure points when the bottle is in your vest and you barely notice it is there at all.
best bottles
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
Great bottle for the trails
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.
Silence is golden
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.
Great bottle, faulty cap
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.
When you need a tiny bit of (extra) water.
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.
Good water bottle
Happy with this bottle. I day hike and slide it into a cargo pocket. It is easy to open and get water out of. It can be squeezed and returns to shape. Would like to see one in a larger size as well.