La Sportiva SoftFlask 500

Ideal size for pockets on vests, belts or hydration packs. The soft material fits in every pocket for comfortable carrying.
The flexible design shrinks when drinking, reducing movement and easily storing the empty bottle.
Leak-proof design with thread. 42mm opening for easy filling and ice with self-sealing teething
valve 100% BPA and PVC free, wide operating temperature range (can be frozen to a maximum temperature of 60° C / 140° F)