[silly]

I rock total liquid nutrition for anything less than 15 hours. My personal favorite for longer than 2 hours is a custom Sustained Energy, Heed, Endurolytes, Hammer Gel food bottle (all from Hammer Nutrition), premixed concentrated for the desired amount of time-
I use 300 calories per hour = 2 scoops heed and 1 scoop sustained energy. topped with some hammer gel expresso love, and endurolytes as per heat / exertion.

2 hr bottle = 4 heed, 2 sustained, etc...

up to a 3 hour bottle. for a century, I just premix and stow in a baggie to refill at a water stop. Training hard and long this summer, I was able to get all my nutrition in a food bottle and still enjoy the taste of fresh water, cause I "nurse" the bottle and wash down with water. Constant, even nutrition without GI distress or energy spikes. It does take awhile to find you "mix" both in concentration and in taste.