Are you planning to buy gu flasks, and are you confused about the options ? Your search ends here.

Our review process: Show/Hide

Our Top Picks:

Best Overall: Buy: Gu Flask READ REVIEW

Best With Good Value: Buy: Gu Energy Variety Pack READ REVIEW

Best With Fast Shipping: Buy: Gu Energy Best Energy Gel READ REVIEW

Best For Gym Bag: Buy: Gu Energy Real Chocolate READ REVIEW

Best For Low Blood Sugar: Buy: Gu Energy Chocolate Flavor Energy Gel READ REVIEW

Best For Campfire Smores: Buy: Gu Flask READ REVIEW

Best For Long Runs: Buy: Gu Energy Original Sports Energy Gel READ REVIEW

Best For Citric Acid: Buy: Gu Energy Sugary Gel READ REVIEW

Best For Real Food: Buy: Gu Energy Sports Nutrition Energy Gel READ REVIEW

Best For Triathlon: Buy: Gu Energy Energy Gel READ REVIEW

Best For Consuming Before A Race: Buy: Gu Energy Worlds First Energy Gel READ REVIEW

Best Overall: Gu Flask

Buy on Amazon

The Gu Flask has good features for the price point. The gu flask tastes great and it is best for long bike rides. . The original sports nutrition energy gel designed to help athletes perform their best.

Above all, the gu flask is very tasty and it is great for lemon flavor.

Almost all buyers found that the flask is great that they have no high fructose corn syrup. And, a few also found that the flask is easy to carry along on bicycle rides and easy to consume while riding to provide an energy supplement and to replenish important minerals & electrolytes used in the workout. Further, a few strongly agree that these gu products are a shot of carbs with a dose of sodium and amino acids. Overall, the tone of buyers is very positive and we believe that the flask suits the purpose.

• Branched-chain amino acids to help decrease muscle damage and mental fatigue.
• This works as described, is ideal for good flavor and it allows for great flavor.
• These make long distance runs possible.
• This comes in close second, Additionally this price is way better.

Best With Good Value: Gu Energy Variety Pack

Buy on Amazon

The Gu Energy Variety Pack is satisfactory and appropriate and fits well with your regular use. The gu energy variety pack does the trick and it is made with great taste. . Further, it is great with a nice texture, is lightweight and it has excellent flavor.

The flask includes chocolate outrage, salted caramel, vanilla bean, jet blackberry, tri-berry, and strawberry banana. Lastly, the gu energy variety pack is healthy and it works for gym bag.

Most buyers quickly discovered that the flask is easy to open while running, and they helped get rid of the runners cramps. Further, they also found that the flask is great...what an unexpected discovery. Also, they say that the flask is pure carbs for an energy jolt.

• This does it'ssssss job of keeping you fueled.
• This offers great pricing on gu gels for runners.
• This can run for hours with a pocket of these.
• This is easy to eat and it delivers great energy.

Best With Fast Shipping: Gu Energy Best Energy Gel

Buy on Amazon

Gu Energy makes beautiful and great flasks with classic and smartly chosen materials. The Gu Energy Best Energy Gel has excellent flavor and it is best for good taste. Chocolate outrage contains 20mg of caffeine, 50mg of sodium, 40mg of potassium. Moreover, it is natural, is lightweight and is suitable for gym bag.

The flask does the trick, is used for birthday cake and it is easy to digest. Furthermore, it tastes pretty good and it works great. Finally, the gu energy best energy gel is great with fast shipping, is great with awesome taste and it makes for great flavor.

Almost all buyers quickly discovered that the flask is used to use the power gels from the powerbar. And, a few also found that the flask can be used in a 100 mile ride towards the end. Moreover, a few say that this is the gel being handed out in so many races. In conclusion, most customers find the flask is functionally comfortable and no one questions it.

• It is healthy, is too sweet and it is made for good value.
• This is easy to tear open, eat real quick and boom.
• This has always lasted fine for the vanilla bean flavor.
• They have caffeine in them, which is always great.

Best For Gym Bag: Gu Energy Real Chocolate

Buy on Amazon

Next on the list, we've got yet another product that manages to win our hearts. It's the Gu Energy Real Chocolate and it's widely considered as one of the most convenient products you can buy. The gu energy real chocolate can also decrease perceived effort during exercise. The original sports nutrition energy gel is the energy gel that started it all. In addition, it is easy to digest and it works great.

The flask provides great value and it makes for great flavor. In addition, it tastes great, is great with awesome taste and it is great for hiking. Lastly, the gu energy real chocolate works fast, is used for citric acid and it is great for a great price.

Most buyers found that the flask is used to see tons of these as free samples during races. And, a few say that the flasks work well. They are easy to catch to open and to eat and they taste good. Further, they say that the flask does it'sssss job keeping you fueled. Overall, buyers found this to be one of the best flask for daily purposes.

• This has 20mg of caffeine per packet.
• This is in honor of hall of famer gene upshaw who passed away in August.
• This is easy to squeeze out and suck on from the pouch while running.
• This is why people also complain that carbs bloat them.

Best For Low Blood Sugar: Gu Energy Chocolate Flavor Energy Gel

Buy on Amazon

Gu Energy has been making great flasks for years, thanks to a combination of clever design and appropriate materials. The Gu Energy Chocolate Flavor Energy Gel goes down easily and it is best for good taste. Gu energy gel sustains all forms of athletic activity with a highly compact, portable, and calorie-dense packet that is loaded with carbohydrates that can be rapidly absorbed. In addition, the flask has potassium citrate and it is lightweight.

Finally, the gu energy chocolate flavor energy gel is made for real food and it works great.

Most customers found that the flask had been used for years the standard gu and it was OK. And, they also found that the flask is great for waking the brain up, especially on super-long runs. Moreover, a few also found that the flask can be a pre workout. It has caffeine, amino acids, and electrolytes and carbs.

• It has a shelf life of 1-1/2 years.
• The Vanilla bean contains 20mg of caffeine, 60mg of sodium, 40mg of potassium. Vegan and gluten free.
• This provides a quick and easy way to keep fuelled up.
• They have caffeine in them, which is always great.

Best For Campfire Smores: Gu Flask

Buy on Amazon

The Gu Flask is the most convenient product on the market today. The guflask is certified gluten free, is good for long bike rides and it allows for great flavor. The Caffeine-free variety pack contains 24 gels. And, the flask tastes great and it is too sweet.

The flask is ideal for good flavor and it comes with great stuff. Lastly, the guflask is pleasant to eat, is good for race day and it goes down easily.

Almost all customers opine that the flask is also useful as a safety measure for hypoglycemic. Moreover, a few strongly agree that the flask comes in close second and also this price is way better.

• This is easy to take down, tastes good and works.
• This is easy to swallow. 100 calories in each gu rocket fuel packet.
• This works as described and it is great for boosting energy.
• It comes in an amazing array of flavors.

Best For Long Runs: Gu Energy Original Sports Energy Gel

Buy on Amazon

The Gu Energy Original Sports Energy Gel should be able to handle its purpose and duties with ease. The gu energy original sports energy gel tastes great and it is good for sea salt. Each serving of gu roctane ultra endurance energy gel contains 100 calories and 1425mg of amino acids. These ingredients boost roctane's efforts to help decrease muscle damage, promote muscle repair, and maintain water balance.

Most importantly, the gu energy original sports energy gel is used for citric acid and it has an excellent flavor.

Most customers agree that the flask is great for endurance training (marathon, ironman...) and the little kick of caffeine is a nice boost. Also, a few strongly agree that the flask comes with a one year to 6 month period. Also, a few say that the flask provides a critical boost of fuel during prolonged events. In conclusion, many customers have used the gu energy original sports energy gel for more than a few months without any problems, and it shows no sign of giving up.

• The chocolate - coconut flavor, on the other hand, tastes great.
• This has potassium sorbate, is great for long runs and it is ready to use.
• The ultra-endurance energy gel - 100 calories and essential electrolytes in a portable packet.
• It is too thick, it works great and it is very good.

Best For Citric Acid: Gu Energy Sugary Gel

Buy on Amazon

The Gu Energy Sugary Gel's material feels more premium than its price would suggest. The gu energy sugary gel something safe, is great for sea salt and it is good for citric acid. . And, it tastes great and it is great for energy.

Lastly, the gu energy sugary gel is good for fast delivery and it is easy to digest.

Most customers opine that the flask is easy to pack an extra one for a mid ride snack if needed. Moreover, a few say that the flasks are all good products but for different reasons. In addition, they also found that the flavor is palatable, but who is savoring gel packs. In short, for most customers, the flask was what they were looking for.

• This is packaged in a ziploc baggie, not a box.
• This is used to, but they definitely work.
• This is easy to dispense and it is for real food.
• This is great for replenishing protein while active.

Best For Real Food: Gu Energy Sports Nutrition Energy Gel

Buy on Amazon

The Gu Energy Sports Nutrition Energy Gel is capable of outshining several other products featured in this list in overall features for the price point. The gu energy sports nutrition energy gel is safe, is for real food and it is good for citric acid. Chocolate outrage contains 20mg of caffeine, 50mg of sodium, 40mg of potassium. And, it has potassium citrate, suitable for race day and it is great for hiking.

The flask is easy to dispense and it is good for birthday cake. Moreover, it is great for long runs and it is great for a great price. Above all, the gu energy sports nutrition energy gel is with fast shipping, is great with awesome taste and it fits well with great taste.

Most buyers agree that the flask provides good energy plus it is great for running and cycling. Furthermore, a few also found that the flask can be helpful for energy during a longer race. And, they strongly agree that the flavor is palatable, but who is savoring gel packs. To sum up, most customers found the flask is functionally comfortable and no one questions it.

• It is organic, is great for sea salt and it is great for lemon flavor.
• Chocolate outrage contains 20mg of caffeine, 50mg of sodium, 40mg of potassium. Vegan and gluten free.
• This is great for replenishing protein while active.
• This comes in a wide variety of good tasting flavors.

Best For Triathlon: Gu Energy Energy Gel

Buy on Amazon

The Gu Energy Energy Gel is suitable and reliable and fits well with your daily uses. The gu energy energy gel is made with natural flavors, is ready to use and it is natural. . The original sports nutrition energy gel in a 15 serving packet designed to help athletes perform their best.

The flask is great for sea salt and it works for endurance athletes. Most importantly, the gu energy energy gel has potassium sorbate and it makes for a great flavor.

Almost all customers agree that the flask also has the chews out which are great too. Further, a few strongly agree that the flask is a reasonably priced bulk pack. Also, they also found that the 5 serving flask ca n't be convenient to carry on a run.

• It has great flavors and it works great.
• This has potassium citrate, tastes delicious and it is easy to use.
• This is good for consuming before a race.
• It is easy to eat on the bike at a fast pace line.

Best For Consuming Before A Race: Gu Energy Worlds First Energy Gel

Buy on Amazon

The Gu Energy Worlds First Energy Gel is suitable and reliable and fits well with your daily purpose. The gu energy worlds first energy gel works great and it has potassium citrate. . Further, it has potassium sorbate, is ready to use and it provides great value.

The flask fits well with great taste, allows for great flavor and it is easy to use. Finally, the gu energy worlds first energy gel has great flavors, is natural and it tastes delicious.

Most buyers agree that the flask is a reasonably priced bulk pack. Moreover, they say that the flask also has chews, which are great too. And, they also found that the flask is easy to eat on the bike in a fast pace line.

• This is made with natural flavor and it works for endurance athletes.
• Good investment for the long term.