Name: portable folding water bag material: Material: Composite material three layers PE + pa + pet (BPA free, environmental protection material) product capacity: 700ml 13x23cm (including 13x26cm cover) gram thickness weight: 0.20mm gram thickness weight 27G product features: Innovative soft kettle type, The foldable feature makes the kettle can be flexibility for a variety of spaces, compared to the traditional rigid kettle, more suitable for hiking as a water container action, at normal times can be installed in a backpack or waist, ready to fold ten percent fit into pockets or backpacks, for hikers, Can increase space utilization rate more effectively, weight can be lighter! Advantage: re-usability. Foldable, easy to clean and washable. Portable. Food grade material.