Ultralight TPU Soft Flask – Collapsible Water Bottle for Running Vests & Hydration Packs (250ml–750ml)

Built for the Vest. Designed for the Distance.

The Trekker Essentials Ultralight TPU Soft Flask is engineered specifically for runners, trail athletes, and hikers who use hydration vests, waist bags, or hydration packs. Available in 250ml, 500ml, and 750ml, each size is optimised to fit standard vest flask pockets — sitting flush, staying secure, and collapsing progressively as you drink.

Made from food-grade, BPA-free TPU, it’s one of the lightest hydration options available for endurance athletes and backcountry adventurers.

Specifications

Why Choose This Flask?

• Vest-optimised sizing: 250ml, 500ml, and 750ml options fit standard hydration vest pockets perfectly.
• Collapses as you drink: Reduces in volume with every sip — no sloshing, no wasted space.
• Ultralight construction: Adds minimal weight to your vest or pack setup.
• BPA-free TPU: Food-grade, taste-neutral material for clean hydration on every run.
• Leakproof seal: Secure closure keeps your vest and gear dry.

Ideal For

• Trail runners and ultramarathon athletes using hydration vests
• Hikers and backpackers with hydration pack setups
• Cyclists using waist-mounted hydration systems
• Mountaineers and adventure racers needing lightweight water access

In the Box

• 1 × Ultralight TPU Soft Flask (250ml, 500ml, or 750ml)

Note: Rinse before first use. Not suitable for hot liquids or temperatures above 40°C. Dry fully before folding for storage.