I found this on the Brett's Zen and the art of Triathlon website, who found it on Marc's website. It's a great idea. I'll have to try this soon.
On an economical point, Marc figures this is about 1/5th the cost of commercially available gels, plus it's healthier too, because there it's all natural, and doesn't have any addatives or chemicals. Marc mentions this on his website, but not in the video - but if you have an aversion to honey, either vegan or allergy - you can substitute agave nectar for the honey.