These gels are the same manufacturer (?) as the
Go Gel Marathon Belt, which is excellent! the gels are a little difficult to fit into the belt but once in place they behave themselves - don't work free or splash around, but I could get them out in spite of being tired and uncoordinated on the London Marathon this year.
Unfortunately they didn't give me any energy at all! I still had half a belt full by the end of the marathon even though I'd eaten numerous orange segments, bananas, jelly snakes, jelly babies, chocolate brownies, and bottles of water, because I simply didn't feel refreshed from the gels at all. Suggest you try a different make of gel. Lucozade seemed to work for me, though I confess the fresh fruit seemed to work best.
Body Fuel Orange Gel. I've certainly had energy gels that work brilliantly so I'll update this if I find the one that works - after all, you can hardly run a 20 mile training run with a basket of fruit on your head!