Vapur BladderIn between refills this BPA free 'anti-bottle' can be flattened or rolled up t0 fit in any little convenient place. It's dishwasher safe and the odour, taste and stain resistant polyethylene liner keeps the weight down to only 30 grams. It comes with a handy carabineer and you can even stick it in the freezer for a cold drink on the trail.
