When I am doing my ironman distance triathlons, (just did Vineman 140.6 last week in Sonoma County, CA), I usually cut the Gatorade they hand out run aid stations with 50% water or pour it over ice letting it melt.

YMMV, but for me but putting different types of sugar in my gut, digesting at different intervals, plus the constant movement, gives me some GI distress so I try to keep stuff light.