Lightweight. Foldable. Ready.The TPU Collapsible Soft Flask is the go-to hydration bottle for runners, hikers, and outdoor enthusiasts who demand performance without the bulk. Available in 250ml and 500ml sizes, this ultra-flexible flask collapses flat when empty — saving space in your vest, waist bag, or pack — and expands instantly when you need a drink.Made from food-grade TPU, it's BPA-, lightweight, and compatible with standard 28mm and 30mm bottle openings. Whether you're racing a trail or setting up camp, this flask keeps up with you.Specifications Feature Details Capacity Options 250ml / 500ml Material Food-grade TPU (BPA-) Weight Approx. 30g (250ml) / 35g (500ml) Temperature Range 0°C – 40°C Color Blue Compatibility 28mm / 30mm bottle openings Closure Straw / nozzle included Design Collapsible / foldable Why Choose This Soft Flask? Ultra-Lightweight: Weighs as little as 30g — you'll barely notice it in your pack. Collapsible Design: Folds flat when empty, expands to full capacity when needed. Food-Grade TPU: BPA- and safe for drinking water. Wide Compatibility: Fits standard 28mm and 30mm openings for versatile use. Includes Straw/Nozzle: Drink on the move without stopping. I For Trail runners and marathon runners using hydration vests Hikers and backpackers minimizing pack weight Cyclists needing a compact water source Camping and outdoor adventures In the Box 1 × TPU Collapsible Soft Flask (250ml or 500ml) 1 × Straw / Nozzle