{"product_id":"hydrapak-softflask-speed-500ml-low-profile-compressible-flask","title":"HydraPak SoftFlask Speed 500ml - Low-Profile Compressible Flask","description":"\u003cp\u003eIn this review the HydraPak SoftFlask Speed 500ml is assessed as a lightweight, low-profile solution for runners and pack hikers who need a compact, fast-refilling bottle. The single biggest reason to buy is its combination of a tapered, pinch-welded base that fits snugly in hydration vest pockets and a one-handed SpeedFill cap that makes refill stops at aid stations quick and reliable. For anyone who values minimal movement, fast access to fluids and gear that packs away when empty, this flask delivers a focused, practical design.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-profile tapered shape:\u003c\/strong\u003e The pinch-welded base and soft material create a slim, tapered flask that slips into most vest and pack pockets without bulging or bouncing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollapsible design:\u003c\/strong\u003e The soft TPU body conforms to pocket shapes and shrinks as you drink, which reduces sloshing and makes it easy to pack down when empty.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeedFill cap:\u003c\/strong\u003e The flip-open SpeedFill cap pops open with a side tab for one-handed refills and snaps closed with an audible click to reduce spills.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBite valve seal:\u003c\/strong\u003e The self-sealing silicone bite valve delivers sips on demand while preventing drips when not in use, keeping pockets and gear dry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter compatibility:\u003c\/strong\u003e Accepts 42mm threaded backcountry filters so it can be used with simple filter caps for treated water on longer outings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight construction:\u003c\/strong\u003e At just grams of mass, the soft materials keep carried weight low for fast-paced activities.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe SoftFlask Speed 500ml is aimed at trail runners, fastpackers and triathletes who carry fluids in slim vest pockets or running packs and who need quick refills at aid stations. Its tapered shape and low weight make it ideal for shorter runs or events where a full bladder is unnecessary but on-demand sipping matters.\u003c\/p\u003e\n\u003cp\u003eThose who want a rigid bottle that stands upright on a table, carries ice long-term, or prefers a larger capacity for extended solo hikes should look elsewhere; this flask is optimized for light weight, compact storage and fast access rather than cold retention or high-volume storage.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVery low profile when loaded, which reduces bounce and fits most vest pockets comfortably.\u003c\/li\u003e\n\u003cli\u003eSpeedFill cap allows rapid, single-handed refills at aid stations or on the trail.\u003c\/li\u003e\n\u003cli\u003eCollapsible body shrinks as you drink, minimizing movement and packing away neatly when empty.\u003c\/li\u003e\n\u003cli\u003eCompatible with common 42mm filters for simple backcountry water treatment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot insulated, so it does not keep liquids cold for long and is not ideal for ice storage.\u003c\/li\u003e\n\u003cli\u003eSoft walls mean it will not stand upright on hard surfaces and can feel flimsy compared with rigid bottles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity\u003c\/td\u003e\n\u003ctd\u003e500 mL \/ 17 fl oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e46 g \/ 1.6 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e260 mm x 80 mm \/ 10.2 in x 3.1 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterials\u003c\/td\u003e\n\u003ctd\u003eTPU, PP, Silicone, POM, 304SS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003eSoftFlask 500ml, SpeedFill Cap, Bite Valve, Care Instructions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe HydraPak SoftFlask Speed 500ml is a practical, well-executed flask for runners and pack users who prioritize low weight, a snug fit and fast refilling. It is good value for anyone who needs a compact drinking solution that shrinks away as you drink; however, those needing insulation or a rigid bottle should consider alternatives.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs the cap easy to open while running?\u003c\/strong\u003e\u003cbr\u003eYes, the SpeedFill cap uses a side tab that pops the cap open for single-handed operation and snaps closed with a click to avoid accidental openings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I attach a filter to this flask?\u003c\/strong\u003e\u003cbr\u003eYes, the flask accepts 42mm threaded backcountry filters and is compatible with HydraPak 42mm filter-style caps for treated water use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the flask leak in a pack?\u003c\/strong\u003e\u003cbr\u003eThe self-sealing silicone bite valve and SpeedFill cap are designed to prevent drips and leaks when closed, but users should ensure the cap is fully snapped shut after refilling.\u003c\/p\u003e","brand":"HydraPak","offers":[{"title":"Default Title","offer_id":48650631479515,"sku":"B0DS3QNZDV","price":38.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61PTeNTyfYL._AC_SL1500.jpg?v=1778696961","url":"https:\/\/gearmusthave.com\/products\/hydrapak-softflask-speed-500ml-low-profile-compressible-flask","provider":"GearMustHave","version":"1.0","type":"link"}