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GU Energy Refillable Flask for Sports Nutrition Energy Gel, 5.1-Ounce

4.5 4.5 out of 5 stars 923 ratings

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Refillable Flask

Purchase options and add-ons

Brand GU Energy
Finish Type Polished
Shape Rectangular
Item Weight 0.05 Pounds

About this item

  • Fill GU Energy flask with energy Gel's 15-serving pouches
  • Holds 5 servings of energy Gel
  • Soft flask with high-flow nozzle
  • Includes marks on the back for measurement
  • Reusable container allows for refilling

Additional Details

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$12.95 ($12.95/Count)
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From the manufacturer

OUR WHY

Through training, we grow stronger, get faster, and learn how to endure more. By eating the right nutrients, in the right amounts, at the right time, we build our muscles, mend our bodies, and optimize our performance.

We are in pursuit of our ultimate potential. With smart training, and the perfect mix of nutrients delivered at the right time, we can unleash our innate and boundless athletic capacity. Our desire to achieve just a little bit more drives us to answer what to eat, how much to each, when to eat.

We know there's no terminus, but we also know every small breakthrough brings us a step closer to realizing our true potential.

Product Description

We teamed up with our neighbors at hydrapak to design a customized soft-flask with a high-flow nozzle to make fueling for long efforts more convenient and less sticky. The Flask holds servings of energy Gel and includes marks on the back to measure your fuel. Fill it with energy Gel from our new 15-serving pouches, fuel with it, and reuse it.

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 1.75 x 3 x 9 inches; 0.8 ounces
  • Item model number ‏ : ‎ 769493101006
  • Date First Available ‏ : ‎ February 9, 2016
  • Manufacturer ‏ : ‎ GU Energy Labs
  • ASIN ‏ : ‎ B01BLVG90Q
  • Country of Origin ‏ : ‎ China
  • Customer Reviews:
    4.5 4.5 out of 5 stars 923 ratings

Important information

Legal Disclaimer

Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.

Looking for specific info?

Customer reviews

4.5 out of 5 stars
4.5 out of 5
923 global ratings

Customers say

Customers like the quality, ease of use, and energy of the nutritional supplement. For example, they mention it works well, is easy to take, and provides great energy for long-distance runners and bike riders. They're also satisfied with the taste. That said, opinions are mixed on value, ease cleaning, and size.

AI-generated from the text of customer reviews

42 customers mention37 positive5 negative

Customers like the quality of the nutritional supplement. They mention that it works well, is easy to drink out of, and is very effective. Some say that the product is overall good and has no issues with usability or performance. Customers also mention that the container works great and is easy clean.

"Great running flask, just put my gel in and I am good to go" Read more

"These flasks work well enough...." Read more

"Great excellent product" Read more

"Product is overall good. Will order more." Read more

28 customers mention20 positive8 negative

Customers find the nutritional supplement easy to use. They say the vanilla flavor is easy to take, and the pouch is easy-to-reseal on the go. Customers also say it's convenient and creates less waste. They also mention that the pouch holds 5 GU packs in one spot, making it easy to consume.

"This is easy to load in energy gels, I use it for my Gu packs for long runs. Fits in my pack or in the pocket." Read more

"...Get a funnel to put gel into the flask. Easy to use, never leaks...." Read more

"These are really handy to have but there are are limitations. It is difficult and messy to get gels into them...." Read more

"The taste is okay. I like the convenience mouthpiece. It does what it said to provide you energy during sports and after sports." Read more

27 customers mention27 positive0 negative

Customers like the energy of the nutritional supplement. They say it provides good sustained energy supply for long distance runners, bike rides, and triathlons. Customers also say it's the best supplement for energy needs in endurance performances, and is great for marathon training.

"Great for long run fueling...." Read more

"GU is the best supplement for energy needs in endurance performances." Read more

"...longer lasting, I can go on long hikes and runs only bring 1 pouch that fits in..." Read more

"...Overall an amazing supplement while riding especially mountain bike. I can't think of any other food that can gives me the boost." Read more

27 customers mention20 positive7 negative

Customers like the taste of the nutritional supplement. They mention it has a good flavor, and is much tastier and easier to eat than berries.

"The taste is okay. I like the convenience mouthpiece. It does what it said to provide you energy during sports and after sports." Read more

"...I was sceptical about getting the chocolate flavor, but this is much more tastier and much easier to eat compared to berry (purple pouch)..." Read more

"...I thought the flavor was fine, but some other runners in the family didn't care for it. It could be why this flavor was so cheap - LOL!" Read more

"...However, the Caramel flavor which I ordered tasted like chemicals...." Read more

32 customers mention20 positive12 negative

Customers are mixed about the value of the nutritional supplement. Some mention that it's economical, easy to use, and environmentally friendly. They say the price is better than the individual packets, and the size of the bottle is great. However, others say that the product is not cheap on a per serving basis, and that it is not worth it. They also say that lots of GU is wasted in this because you just can't get it all out.

"...saves money over single use packaging..." Read more

"...This softflask was a bit pricey compared to its hard bodied counterparts, but the comfort was worth ever penny." Read more

"I like the price. I bought the refillable container for it...." Read more

"The price is better than the individual packets...." Read more

29 customers mention14 positive15 negative

Customers are mixed about the ease of cleaning the nutritional supplement. Some mention that it's not that hard to clean, and is better than leaving hundreds of GUs. However, others say that it gets messy and sticky, and cleaning it is a pain.

"...It is difficult and messy to get gels into them...." Read more

"...It's the perfect size to fit in my FlipBelt, it's pretty easy to clean, and it didn't come with any funky smells or anything...." Read more

"Can be a little messy to fill but once it's full it's ok. You have to really screw this thing on time to make sure it's secure...." Read more

"...These are easy to clean with warm water and a bit of soap! no leaks. (no proof-read)" Read more

22 customers mention9 positive13 negative

Customers are mixed about the size of the nutritional supplement. Some mention that it's the perfect size, fits in their pack, and has a variable serving size. However, others say that it is too big to carry with them on a run or cycle trip, and that it does not fit in their 20oz hand held water bottle pocket.

"...Also, the top is a bit bigger and heavier than it needs to be and can be a bit hard to turn/open without unscrewing the whole thing." Read more

"...It's the perfect size to fit in my FlipBelt, it's pretty easy to clean, and it didn't come with any funky smells or anything...." Read more

"...But I found the large pack really not very good since you can only use it before you run. You can't bring it with you...." Read more

"...Fits in my pack or in the pocket." Read more

14 customers mention0 positive14 negative

Customers are dissatisfied with the lid of the nutritional supplement. They say it cracks easily and allows gel to leak out. Some customers have reported that the lid has come broken.

"...this to reduce my paw print, but when I gave it a little chew, it just fell apart! Now my pawrent has to buy a replacement. AND, I got a time out!" Read more

"...that and tried it out anyway, not realizing that the crack prevented the flask from sealing so I had one GU-ey pocket. :)..." Read more

"Really cheaply made. Feels like it’s going to break. For the price it’s not worth it. Go to Walmart and buy the travel shampoo containers...." Read more

"...This one came with a crack on the cap and gel leak out ." Read more

Great idea but a few flaws -- Flask and Refill don't connect to each other
3 Stars
Great idea but a few flaws -- Flask and Refill don't connect to each other
So my flask arrived broken (see pic, the crack in the nozzle is NOT a design feature) but I didn't realize that and tried it out anyway, not realizing that the crack prevented the flask from sealing so I had one GU-ey pocket. :)But my real issue with the flask is that the flask and the GU refills don't couple, i.e. screw to each other, for refill. With only two hands just filling the flask becomes a super GU-ey mess. This is a shame because I like the idea of a GU flask and less garbage in around races, and I wish this product had worked for me; I'm a GU fan, this just doesn't work well.
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Top reviews from other countries

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Amazon Customer
5.0 out of 5 stars Expensive, but worth it!
Reviewed in Canada on May 20, 2023
Flavor: Refillable FlaskVerified Purchase
Nikolaos
1.0 out of 5 stars Received Today - expired 4 years ago
Reviewed in Germany on August 31, 2022
Flavor: Sea Salt ChocolateVerified Purchase
Customer image
Nikolaos
1.0 out of 5 stars Received Today - expired 4 years ago
Reviewed in Germany on August 31, 2022
I received the product today 31-08-2022. The package was not in a good condition so i tried to find the expiration date. JUL 2018 !!!!
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Alain Poplemon
4.0 out of 5 stars Too big
Reviewed in Canada on August 22, 2019
Flavor: Sea Salt ChocolateVerified Purchase
Howie
5.0 out of 5 stars Best GU flavour. Team this and a soft flask.
Reviewed in the United Kingdom on October 11, 2019
Flavor: Salted CaramelVerified Purchase
Mickael G.
2.0 out of 5 stars Bof
Reviewed in France on March 28, 2019
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One person found this helpful
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Disclaimer: While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer. Content on this site is for reference purposes and is not intended to substitute for advice given by a physician, pharmacist, or other licensed health-care professional. You should not use this information as self-diagnosis or for treating a health problem or disease. Contact your health-care provider immediately if you suspect that you have a medical problem. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition. Amazon.com assumes no liability for inaccuracies or misstatements about products.