CNOC Vesica Collapsible Bottle 1L 42mm

The CNOC Vesica 1L is a collapsible TPU soft flask with a capacity of 1 litre and a weight of 60 g. The 42 mm neck is rigid rather than floppy like a standard soft flask thread, so the bottle keeps its shape when full and stands upright rather than slumping over, while the body still packs flat once empty. The wide 38-42 mm opening is compatible with Katadyn filters, letting you screw a filter straight onto the bottle for dirty-to-clean filtering without extra tubing. Material is food-grade, BPA/BPS-free TPU. This suits hikers who want more carry capacity than a typical 500-750 ml soft flask without going to a rigid Nalgene-style bottle that never compresses - it will not survive being used as a hammer or dropped repeatedly on rock the way a hard-sided bottle might.