Energy gels pro's and con's
Pro= lot's of flavours, easy to carry a few.
Con= can upset your stomach (mouth tells brain lots of high energy foodstuff, brain tells stomach to go into hyperdrive) with dire consequences.
= litter the road/trail with packets, I have suggested to Torq to alter their packaging so that it biodegrades quickly
Personally I have found the good old fashioned marzipan works, ingredients you can understand, cheap, causes a lot less stomach upset due a more natural structure, you can bite a chunk off and do a hamster impression. Graham Obree swears by it only comes in one flavour though.