The Perfect, Lightweight Collapsible Water Bottle for On the Go
Soft Flasks & Collapsible Water Bottles: The Lightweight Way to Stay Hydrated
If you’ve ever tried to carry a bulky bottle on a run or hike, you’ll know how annoying it is — awkward to hold, heavy when full, and never quite fitting into your pack the way you want.
That’s where soft flasks (also called soft water bottles or collapsible water bottles) come in. Lightweight, compact, and designed to shrink as you drink, they’re the go-to hydration solution for trail runners, hikers, and travellers who want fuss-free water on the move.
What is a Soft Flask?
A soft flask is a flexible water bottle that collapses as you drink, taking up less space and reducing annoying sloshing sounds. Most are made from BPA-free thermoplastic polyurethane (TPU) and feature a bite valve for easy, spill-free sipping.
They’re also known as:
Why Choose a Soft Flask Over a Hard Bottle?
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Compact – Fits in running vest pockets, waist belts, or small backpack pouches.
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Lightweight – Much lighter than hard bottles of the same size.
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No Sloshing – Collapses as you drink, so water isn’t sloshing around.
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Easy to Pack – Rolls or flattens when empty, saving space in your bag.
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Travel-Friendly – Meets carry-on liquid rules (just empty it before security) and takes up almost no room in your luggage.
When to Use a Soft Flask
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Trail running – Perfect for carrying water or electrolyte mix on the move.
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Day hiking – Compact enough to carry multiple flasks for longer walks.
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Travel – Space-saving hydration for airports, road trips, or city exploring.
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Everyday convenience – Keep one in your bag for quick refills on the go.
The Roam 500mL Soft Flask
Our 500mL soft flask is built for movement — whether you’re hitting the trails, heading out for a long run, or packing light for your next trip.
Why it’s great:
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500mL capacity with easy-drink bite valve
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Wide lid for quick refills and easy powder mixing (hello, Roam Protein)
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Grooved cap for grip
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BPA-free with volume markings
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Two bright colours (blue and orange) to easily tell drinks apart
How Our Soft Flask Compares
You’ve probably seen big-brand running flasks (like Salomon soft flasks) — ours offer the same performance benefits with Roam’s focus on clean design, practical details, and price that won’t make you think twice.
Tips for Using Roam's 500mL Soft Flask
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Pair it with your pack – Fits most running vests and hiking packs with front flask pockets.
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Get both colours – Use one colour for water, one for electrolyte mix.
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Clean after each use – Rinse with warm water and mild soap. The bottom of the bottle doesn't cling together, so it can air-dry properly.
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Bite the valve – No having to twist the cap to access your fluid, simply bite the valve and drink.
