Suitable for filling with water, electrolytes, energy gels or your own nutrition mix, this soft water bottle keeps you hydrated on the go. Shrinking as you drink, it eliminates liquid sloshing around and stashes neatly in a running vest or belt pack, pocket or pouch. Weighing just 40g and carrying up to 500ml of liquid, it's perfect for mountain running and fast-hiking days, or for stashing in your backpack on daily adventures. Easy to refill with a soft, bite activated valve, it's been designed to re-seal after each sip to prevent leakage and stand up to rigorous mountain days. Made from flexible TPU it's abrasion resistant and durable, with welded seams for flexibility and resilience. The Softflask is 100% BPA and PVC free.