The 500ml blue Soft Flask is a flexible and practical option for carrying your sports drinks during races or training sessions. Its collapsible design allows you to reduce its volume when empty, taking up less space. Perfect for runners or cyclists looking for convenience and lightness. Instructions for use Fill the Soft Flask with water or an isotonic drink, and drink by gently squeezing the bottle. Its flexible design makes it easy to use and store. Pharmaceutical advice 500ml flexible bottle. Ideal for runners and cyclists. Fits in any space. Use with cold liquids.