Don't take any space when empty cause foldable and yet hold well when there is water inside ! This is useful and fun product :D
Dear Paule, thank you for your time in leaving us with a 5-Star rating on our Trekking Flask Trek 500 Soft 1L. We are glad that we managed to delight you with the standards of our product. We really appreciate your loyalty with Decathlon. Please let us know if there is anything else we can improve on in the future. Thank you once again for your time and we hope to serve you again soon!