I too carry 2 quarts per fill-up on the water. Too much hassle to filter it. Wouldn't be worth a stop for 1 quart.....for me.

I drink about 2 ounces per swallow and usually take about 5 swallows (or 10 ounces) each time I open the bottle for a drink. So the first bottle is usually gone within a half hour after filling it.

People vary greatly in their drinking habits. My sister jokes that she has a drinking problem because she can only take very small sips. My wife is similar. Nether of them even generates bubbles in the bottle when then drink. When I drink the water forms large bubbles in the bottle as if it is boiling. I'm pretty good at guzzling beer too.