Whatever I eat, I prefer anything I can easily reach, easily open, and eat in bites. I plan ahead but if I can't stop to open a gel pack (I know, I know, you can tear it with your teeth but who wants to do that in heavy traffic where drivers see how close they can get to you and blow their horns, and there's gravel/glass/etc. in the bike lane and no where to stop). I'd rather reach into my bento box and take out a piece of non-sticky whatever and pop it in my mouth --- no effort and I don't have to take my eyes off the road.