Simply change your route so you can refill. I ride the tow path and have 3 points where i can fill up and drink 1 bottle per 10 miles or so. Mine are 20 oz bottles. I carry 2 in cages 1 or 2 more in packs depending on how far i plan on riding or if i plan on riding past my preious known area. If your drinking that much water you need that much water.