This beloved Compressport flask is already known to runners around the world, but now features an improved shape for even greater trail speed.
Designed for easy hydration on the go, the new Ergoflask 500ml is tapered on the bottom section to help it slide quickly and easily into a package or a Freebelt.
The fast-flow bite valve makes hydration a breeze so you can focus on where you put your feet, while the lid is guaranteed to be watertight so you don't have unpleasant surprises.
With its intuitive screw cap, this soft, running bottle is easily and quickly filled in help stations so you don't miss precious seconds.
Its flexible material shrinks as you drink, ensuring it takes up minimal volume when empty.
100% PVC and BPA free, ErgoFlask is also eco-friendly and durable so you can use, wash and use again safely