---
product_id: 280650536
title: "(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)"
brand: "energy flask"
price: "£20.45"
currency: GBP
in_stock: true
reviews_count: 13
category: "Energy Flask"
url: https://www.desertcart.co.uk/products/280650536-2-bottles-small-semi-rigid-easy-to-clean-refillable-gu
store_origin: GB
region: United Kingdom
---

# 110ml compact capacity wide mouth for easy cleaning refillable & eco-friendly (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)

**Brand:** energy flask
**Price:** £20.45
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your race, ditch the mess, and join the eco-smart fuel revolution!

## Quick Answers

- **What is this?** (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) by energy flask
- **How much does it cost?** £20.45 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/280650536-2-bottles-small-semi-rigid-easy-to-clean-refillable-gu)

## Best For

- energy flask enthusiasts

## Why This Product

- Trusted energy flask brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Fuel on Your Terms:** Refillable 110ml flask lets you customize your energy gel or DIY fuel for every workout.
- • **Compact & Ready to Go:** Slim 4" semi-rigid flask fits perfectly in cycling jerseys, running belts, and hydration packs.
- • **Mess-Free Performance:** Wide-mouth design and secure snap cap eliminate sticky spills and wasted gel packets.
- • **Eco-Conscious Endurance:** Reusable, PVC-free bottle reduces single-use waste and saves you money on gels.
- • **Effortless Use & Cleanup:** Dishwasher safe with molded finger grips for a secure hold during intense activity.

## Overview

The Energy Flask is a 110ml semi-rigid, refillable sports gel bottle designed for endurance athletes. Its compact size fits easily in cycling and running gear, while the wide mouth and secure snap cap ensure easy filling, mess-free use, and simple cleaning. Made from BPA/PVC-free plastic and dishwasher safe, it supports DIY energy gels and reduces single-use waste, making it the ultimate eco-friendly fueling solution for triathlons, marathons, and outdoor adventures.

## Description

Energy Flask is a refillable semi-rigid gu flask for endurance sports used to carry energy gel, DIY energy fuel, hydration mix, pickle juice or water. These reusable, small gel bottle are simple, fast, and convenient to use and provide a better way to fuel your next workout or adventure. Perfect hammer flask for running, cycling, triathlons, hiking, climbing, snow sports, bike packing, or any endurance sports activity. Compact design makes this gel bottle easy to fit where you need them to: cycling jersey pocket, flipbelt, frame or bar bag, hip pack, fuel belt or hydration pack.

Review: Great as a Triathlon (or running race) Flask! - 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.
Review: Ideal if your energy gel is maple syrup - .. 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.

## Features

- CONVENIENT – Small gel flask that is easy to use and easy to clean. No more struggling with individual gel packets during your workouts or races. These gel flasks allow you to consume as much or as little as you need, as often as you want.
- CLEAN – Eliminate sticky messes and carrying empty gel packet waste.
- EASY – Simple to open/close with secure cap. Unlike other gu bottle, Energy Flask has a wide mouth that makes it easy to fill and simple to clean (dishwasher safe). Molded finger holds on one side for secure grip.
- SAVE $$$ and REDUCE WASTE - Can use do-it-yourself (DIY) sports fuel. Create your own gel mixtures with maple syrup, honey, coffee, Nutella, etc. Better for the environment by eliminating individual gel packets.
- COMPACT and BPA/PVC FREE - Unlike other larger gel bottles, Energy Flask is only about 4" tall and holds 110 ml (3.5oz) capacity. Semi-rigid. Squeezable. Easily fits in small places like cycling jersey pocket, bike frame bags, running fuel belt, hip pack, ski pack, hiking bag, summit pack, or hydration pack.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Additional Features | Dishwasher Safe,Wide Mouth |
| Bottle Type | Sports Bottle |
| Brand | Energy Flask |
| Capacity | 110 ml |
| Color | White |
| Item Dimensions W x H | 4.3"W x 4.3"H |
| Material | Plastic |
| Material Type | Plastic |
| Material Type Free | Polyvinyl Chloride (PVC) Free |
| Number of Items | 2 |
| Product Care Instructions | Dishwasher Safe |
| Reusability | Reusable |
| Shape | Rectangular |
| Special Feature | Dishwasher Safe,Wide Mouth |
| Theme | Sports Nutrition |

## Product Details

- **Bottle Type:** Sports Bottle
- **Brand:** Energy Flask
- **Capacity:** 110 Milliliters
- **Color:** White
- **Material:** Plastic

## Images

![(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) - Image 1](https://m.media-amazon.com/images/I/61wwrfHa8wL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great as a Triathlon (or running race) Flask!
*by M***R on June 1, 2021*

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.

### ⭐⭐⭐⭐⭐ Ideal if your energy gel is maple syrup
*by J***C on October 8, 2024*

.. 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.

### ⭐⭐⭐⭐⭐ Good size - versatile - easy to use and to clean
*by D***N on May 13, 2022*

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.

## Frequently Bought Together

- (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)
- FITLY Soft Flask - Shrink As You Drink Soft Water Bottle for Hydration Pack - Folding Water Bottle Ideal for Running, Hiking, Cycling, Climbing & Rigorous Activity
- HydraPak SoftFlask - Collapsible Nutrition Flask (150ml or 250ml) - BPA Free, Easy Open Cap, Foldable, Lightweight

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-09-17*