I have a bunch of 100 ml bottles (with "0.1 liter" stamped in the bottom). You can fit about 5 or 6 of those in a 1 liter plastic bag. That is enough to keep y

I have a bunch of 100 ml bottles (with "0.1 liter" stamped in the bottom). You can fit about 5 or 6 of those in a 1 liter plastic bag. That is enough to keep you hydrated and getting a drink while traveling.