Endorphin Belt
Endorphin Soft Flask
Endorphin Soft Flask
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Custom-Built Soft Flask (500 ml / 17oz) fits securely in the Endorphin Belt, keeping you hydrated without slowing you down.
- Collapsible Design: This flexible flask shrinks as you drink, minimizing sloshing and freeing up space in your belt as your run progresses.
- High-Flow Bite Valve: Equipped with a leak-resistant, self-sealing nozzle that provides quick sips without spillage.
- Durable & Safe Materials: Made from BPA-free, odor-resistant materials that withstand frequent use and multiple refills.
Features:
- 500 ml capacity
- Soft and flexible
- Twist-to-lock top: zero accidental leakage
- Self-sealing bite nozzle: effortless drinking on-the-go
- Easy-to-grip cap: simple to open, fill, and wash
- Free from BPA, phthalates, and PVC
- Color: light gray and transparent
- Weight: 33 g
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I purchased the belt/flask bundle. The flask does not fit well in the belt and times not at all, especially when frozen. I usually freeze my flasks/bladders as it stays cold and as it melts and I drink, it becomes lighter. The twist close on the bladder is good in theory, but not work very well in execution. Smaller bladder should be an option and slight redesign could be utilized.
The flask’s top is very smart but it’s just not very good for me. As I sweat it becomes a tall task to move the bottle top to open or to close. I wish I could sweat less but doesn’t seem like I can right now. That would be my biggest gripe. Other than that it is still bigger than the opening on the endorphin belt so putting it back into the pocket while running is also tough but that is about the belt and not the flask.
The top twists closed which is nice. It does fit into the belt. However…
Its not the easiest thing in the world yo get into the belt when it is full. In fact, i find i have to slow to a walk or even completely stop running to put this back into the belt.