(2 Bottles) Small, Semi-Rigid, Easy-to-Clean, Refillable Gu Flask for Sports Nutrition Liquid Energy Gel Flask - Cycling Flask, Running Flask, Triathlons, Marathons. 110ml (3.5oz)

I am a Triathlete who does mostly Olympic and Half Ironman Distance races. I have bought a bunch of flasks trying to find the best for gels and liquids for my bike storage and a my TriSuit pockets. This is the best I have found. Size is great (fits all my trisuit pockets and my Tribike built in storage container). Great top (closes tightly/no leaking, easy to open with teeth and close), gets liquids out great. Slides in and out of pockets great. The only thing I would have changed is not having the base of it so firm (hard to squeeze out last bits of gels). However, compared sooo favorably to all others I tried. The rest had many flaws (too big, doesn't close well, hard to consume while running, material sticks/rather than slides into pockets etc). I have bought 8 of these so far and just ordered 6 more (want to make sure I have a bunch if they for some reason become unavailable.

.. or same consistency. I originally tried using Gu branded gel flasks, but the twist top was not so useful when cycling (I use these for endurance MTB & gravel cycling events). Holding the flask with one hand and trying to twist open it with my teeth while pedaling, the entire cap would start to twist off making an awful mess of gel/syrup all over my hand and the bike. These flasks are much more convenient. The pull-top opening is much easier and trouble-free; just a quick pull to pop it open and give a quick squeeze and you're good to go. Then snap it closed with your thumb (or pop it against your helmet) and it's sealed and ready to stow away, leak free. Your only other consideration is what you use for energy gel. I probably wouldn't use these for GU gel, honey or anything with a similar (thicker) viscosity. I'm not sure how well those would flow through the cap opening. Personally I use organic maple syrup for my energy gel and it's the perfect consistency; no matter the temperature it's thin enough to flow.

As a cyclist and hiker I carry gels or liquids in order to fuel up while on the move. I don't like using packaged gels because they are difficult to open and when finished I have to put the sticky package back into my jersey pocket. (I would never drop them by the side of the road or trail). The flask is easy to pull out, open the valve with my teeth and squeeze some gel. Close the valve again and drop back into pocket. Also, the flask carries enough to eliminate carrying multiple gel packs. Finally, I have experimented with making my own gels and the flask is a great carrier.

I really loved this idea because I hate how energy gels are packaged. They cut the side of my mouth, they are hard to open when you are running, and they become a sticky mess no matter how careful you are. These flasks are made of a pretty hard plastic, but they are actually very easy to squeeze. I was able to put two gels in each of them, and I mixed the gels with a little bit of water. I also used them with liquid energy gels which didn't need extra water. I was surprised at how easy they are to clean and they are very light. They are easy to open and close and fit in my pocket easily. I did have one major fail with them during an actual marathon, though. I put them in a pocket where they were pretty free to move around, and the cap came unscrewed and dumped the whole bottle of chocolate gel down my leg. My mistake, but make sure the cap is screwed on tight and the nozzle is closed before you go running.

Works great for endurance sport. I put honey in it, a bit of salt, a bit of water. No leaks, no sticky waste.

These are the best for runs, instead of a gu. They work great.

My go-to energy source! This is compact, convenient, durable yet easy to squeeze that has been flawless. The flow for my maple syrup is smooth, getting that quick energy I need in just a quick easy squeeze. The top pops into place securing it as I have not had it leak on me yet. This is right up my alley as an endurance athletic that I use for mtb, gravel, road and fat-biking. I could not ask for a better product that fits my needs and wants. Super easy to clean. For the price, it has paid for itself ten times over if I were to consistently use gels, such a great investment. Well worth the purchase!

A little too hard to squeeze easily

I’ve been using this for a few months now for small runs and larger runs. Specifically with 10 K runs it works really well with homemade liquid gel solutions to help you give you that boost of energy. Using it with a running vest works extraordinarily well as well as using it for 15k to 20 K runs will allow you to have extra juice to booster energy. Honestly, the price is a little bit expensive, but the usage is well worth the price.

Perfect for making your own running gels, doesn’t leak

Very handy, but pricey.

le plastique de la bouteille est un peu trop rigide; difficile d’extraire le liquide en écrasant celle-ci.

Je m’attendais à ce que ça fonctionne mieux que ça. Il en reste beaucoup dans la bouteille à la fin.