Nalgene Wide Mouth CanteneThe Nalgene Cantene is a soft plastic bladder canteen that can fold roll up flat when not being used. Perfect for backpacking or situations when you may need extra water capacity on hand. The multilayered material offers stiffness and strength for stand up capability, yet is soft and flexible to be folded or rolled. Wide mouth opening accepts ice cubes and provides easy access for cleaning. Also accommodates all major water filters. Guaranteed