I live right on the outskirts of the boonies; 10 min or so down the road there aren't any stores- and I like to go places where I might not even be passed by a car for an hour during the day- there is little economic base to support any stores there. I usually have an idea where I want to go, and about how long and bring "appropiate" hydration; 2 waterbottles and if deemed necessary a 2L or 3L camelbak (didn't know they made a 5 L). Sometimes I expect to go on a 4 hr loop and take 2 bottles; and while out there I'm feeling a good and decide to loop out a bit further.
Heat humidity and some very steep hills can use up liquids faster than expected, not so easy to tell with the camelbak either. And then there are times when I like to try a new road on a whim and have from time to time been about 2hrs away, with about enough liquid to last an hour- going dry for that last hour is not pleasant but isn't really worth the hassle of going out of my way home just to get a drink, plus there are shops that don't allow bikes in their store- so I don't want to go out of my way and end up with a fight with a propietor. At any rate on my way home from a long ride I usually just focus on getting the last bit done; and I really hate stopping on a ride; it's an extra 10 min going in getting the drink paying coming out drinking some filling the water bottle disposing of the container and going- that really kills my legs more than just continuing. I can suffer for an hour, big deal. If it's say 3 hrs away from home, yeah, I can find a place and will, but 2 hrs with 1/2 a bottle left is not really worth it for me.
I was kinda hoping I might get someone with perhaps some military/ survivalist expertise who might be able to say their taught to ration the remainder (as the British did in Egypt during WWII) or maximize the liquid absorption benefit by downing the remaining liquid.
Thank you for your indulgence.