The Wildo Fold-A-Cup measures just a mere 2.5cm wide when folded, yet once popped open it can hold up to 250ml of liquid.__ Taking up a tiny amount of space and weight in your pack, it folds down in such a way that once emptied of liquid it won't drip over any of your gear.__Designed to fit inside the larger original Fold-A-Cup Big, even when it's folded Classified as a work of art by Svensk Form Copyright PanelVolume: 250mlWeight: 25g (0.88oz)Size: 9.4 x 7.2 x 2.9cmMaterial: Thermoplastic Elastomer (TPE)BPA free