Zelvot running soft flasks 500 ml 2 Pack, Blue, collapsible TPU bottles for running vests

Zelvot's 2-pack 500ml TPU soft flasks are collapsible, ultra-light hydration bottles designed to sit securely in running vests and reduce bounce while you move.

These soft flasks pair compression-friendly construction with food-safe materials so you can carry water in a running vest, hydration pack or belt without extra noise, weight or bulk. Each 500ml flask weighs about 50g, folds flat when empty, and uses a bite-activated valve for hands-free sipping. They’re meant for active use—running, hiking, cycling or any endurance sport—where pack space and stable, fast access to fluids matter.

How does the Zelvot soft flask stop bouncing in a running vest?

The cup-shaped, compressible body collapses as you drink, letting the flask conform to the pocket and limiting air movement that causes sloshing and noise. A low-profile shape and balanced fill line keep the weight centered so the flask stays put during strides.

• Collapsible TPU construction that reduces internal air and movement
• Narrow profile fits snugly in vest pockets and small sleeves
• Lightweight 50g design minimizes added swing
• Secure leak-resistant cap reduces accidental spills and noise

Is the material safe and easy to clean?

Yes — the flasks are molded from BPA- and PVC-free food-grade TPU, so they’re safe for drinking water. A wide opening and simple valve design make rinsing and periodic washing straightforward; initial cleaning removes any packing scent.

• 100% food-grade TPU, free from BPA and PVC
• Wide-mouth top for quick filling and thorough rinsing
• Detachable cap and valve for easier access when washing
• Simple care: warm water, mild detergent or baking soda, then air-dry

How quick and convenient is drinking from the soft flask while moving?

The bite-activated valve gives an immediate flow when gently compressed with your teeth or lips, so you don’t have to stop or fumble to sip. The valve’s higher flow rate compared to older soft-flask designs speeds hydration without requiring hand use.

• Soft bite valve opens with a gentle bite for hands-free sipping
• Higher flow rate lets you hydrate quickly on the move
• Leak-resistant when closed to prevent unwanted spills
• Compact shape keeps the bottle accessible in vest pockets

How does the collapsible design benefit pack weight and storage?

When empty the flasks roll or fold, taking up far less space than rigid bottles. This compactness lets you stash extras, keep used bottles separate, or stow flasks in small compartments without adding rigidity to your pack.

• Rollable body folds flat to save space in pockets or packs
• Two bottles per pack let you alternate fluids or replace one mid-activity
• Light overall kit weight supports faster, less encumbered movement
• Fits most running vests, hydration belts and small backpack sleeves

Who is this for? Trail and road runners, fast hikers, cyclers, and endurance athletes who want a low-weight, low-profile way to carry 500ml per flask will appreciate Zelvot’s collapsible soft flasks. They’re also useful for multisport events or travel when conserving space matters. Choose the 2-pack if you prefer an on-route spare, want separate electrolyte and water supplies, or like to alternate hot and cold liquids during long outings.