Fold It. Fill It. Go.The 500ml Foldable Silicone Soft Flask is the ultralight hydration solution for trail runners, hikers, and outdoor adventurers who want maximum performance with minimum bulk. Made from BPA/PVC/phthalate- TPU, it collapses flat when empty and expands to a full 500ml when you need it — fitting neatly into running vest pockets, waist bags, and pack side pockets.The soft bite valve delivers water on demand without stopping, while the wrist strap position keeps it accessible during runs. Available individually or as a 2-pack for longer adventures.Specifications Feature Details Capacity 500ml Material BPA/PVC/phthalate- TPU Dimensions 26 × 7.5 × 3.5 cm (unfolded) Temperature Range 0°C – 40°C Closure Soft bite valve Design Foldable / collapsible Available As 1 pc or 2 pcs Why Choose This Soft Flask? BPA/PVC/Phthalate-: The safest material available for a hydration flask. Collapses Flat When Empty: No awkward bulk as you drink down — the flask shrinks with the water level. Soft Bite Valve: Drink on the move without removing the flask from your vest or pack. Wrist Strap Position: Carry it in your hand comfortably during runs. Available as 2-Pack: Double up for longer adventures or to share with a partner. I For Trail runners and ultramarathon athletes using hydration vests Hikers and backpackers minimising pack weight Cyclists needing a compact water source Any outdoor activity where weight and space matter In the Box1 × 500ml Foldable Silicone Soft Flask (or 2 pcs)