Jerome, for ur sake, I hope so. Think about what ur H20 drinking need may be. If u think 1L will be enough, go with it. For me, two, 1L bottles, did the trick, the next time around. Heavy? Yes, no matter, I drank them all, almost! Better to have some left than none. I don't know if u read an earlier post in which I shared that I ran out of water in this particular road, had to walk a distance to a farm to get some, got back on the road, ran out again, approached a couple of pilgrims that told me they didn't have enough water for me, and then, when I was (almost) fainting, two pilgrims (angels?) came to my rescue, shared their water, and gave me the moral support I badly needed then to walk with me all the way to Roncesvalles. Best, xm 8)