The Hydrapak SoftFlask™ is a best seller, and it’s easy to see why. The bottle is collapsible, making it easy to stash in your clothes or backpack when you’re planning your next adventure. The flask collapses as you drink and is easy to carry, light and flexible. It is also spill proof, self sealing and the valve is easy to remove for cleaning. Great for any adventure activity, no matter what the weather is. It can be frozen if you want to ensure you have some ice cold water for the hot day ahead, or you can fill it with warm water (77°C). A fantastic bottle that is great for travel and sports of all kinds.