Product Description
Your Hard Bottle Is Working Against You. You Just Haven't Noticed Yet.
Your hand cramps up gripping a rigid bottle for two hours. You finish a long effort with a half-full bottle still sloshing in your fist because it never got lighter. You show up to an aid station fumbling with a hard-sided cap while everyone around you fills and moves. The problem isn't carrying water. It's carrying the wrong vessel for the job.
The Feed Skyflask 500ml is the collapsible soft flask built for trail runners and endurance athletes who want a lighter carry, zero slosh, and a flask that disappears when the job is done.
Carry It Without Thinking About It The adjustable hand strap cinches down to your exact hand size for a precise, secure fit — so the flask stays in place without clenching or gripping. Your hand stays relaxed mile after mile, which matters more than it sounds at hour three of a race when fatigue accumulates in places you don't expect.
Gets Lighter as You Go A hard bottle weighs the same empty as it does full and bounces in your hand the whole way. The Skyflask collapses as you drink — eliminating the slosh and imbalance of a half-empty rigid bottle. By the time you reach the next aid station, it's barely there. When it's empty, fold it flat and tuck it into a vest pocket without breaking stride.
Built Tough Enough to Earn Its Place The flask is manufactured by HydraPak, the performance hydration brand trusted by endurance athletes and mountaineers worldwide, using durable TPU construction with RF-welded seams that are heat-fused rather than glued for significantly stronger construction under repeated stress. BPA-free and PVC-free. Tough enough to freeze for cold-drink days or handle the punishment of a 100-miler in summer heat. Comes with a high-flow, self-sealing bite valve and a leak-proof 42mm twist locking cap.
The wide 42mm opening fills fast at aid stations, accepts powders and mixes without a funnel, and drops in ice cubes without drama. At 500ml you have enough capacity for longer stretches between aid stations without the bulk or rigidity of a traditional water bottle.
Set it: Cinch the adjustable strap to your hand size once before your race — it's ready every time after that.
Fill it: 42mm opening handles mixes, powders, and ice at any aid station without fumbling.
Pack it: When empty, fold flat and pocket it. A rigid bottle never disappears like this does.
Trail runners and ultra athletes have made soft flasks the standard for efforts where a full vest feels like overkill. The Feed Skyflask is the clean version — the flask you grab, fill, run, and forget about until you need it again. Backed by HydraPak's Beyond Lifetime Guarantee.
Stop carrying a rigid bottle that fights you for every mile. The Skyflask just works.
For gear that arrives damaged or falls under the manufacturer's warranty: Please send a photo of the damage or error message to hello@thefeed.com. We will either help process a claim for the product and a replacement product or store credit will be provided, or we will direct you towards the correct place to make a warranty claim for the product. For returns on gear that you have used, we follow the manufacturer's instructions for satisfaction guarantees. This is specific to each gear product, terms and conditions may change.
The Feed Skyflask 500ml FAQ's
Everything you need to know before getting started.
Hard bottles stay rigid whether full or empty, creating slosh and imbalance in your hand. The Skyflask collapses as you drink, keeping weight balanced and eliminating that annoying half-empty bounce. When it's done, it folds flat and disappears into a pocket.
Yes. The wide 42mm opening is designed for exactly that — add powders, mixes, or even ice cubes before a run. It rinses clean easily after use.
Yes. The flask is made from BPA and PVC-free TPU — a food-safe material that's safe for all your nutrition and hydration needs. It can also be frozen for cold drinks on hot training days.
The flask and cap are dishwasher safe for easy cleaning. The hand strap should be hand washed and air dried. The wide 42mm opening also makes it easy to clean with a standard bottle brush.
The Feed Skyflask is manufactured by HydraPak — one of the most respected names in performance hydration, trusted by athletes across trail running, cycling, and mountaineering for over two decades. HydraPak builds the flask using their premium TPU construction and RF-welded seam technology found across their performance lineup, just in The Feed's branding.