I am in no way the same league as the guys above..
I use SiS Go (the 6% level on the SiS bottle) prior to and during exercise
and post ride the Lucozade recovery drink – it actually tastes quite nice.. it says 250ml of water for a pack but I use about 350 to 400ml – quite a nice orange juice flavour – instead of the claggy milkshake type drinks of SiS and others
as far as Red bull/Monster/Relentless 'energy' drinks go.. Caffeine and sugar in massive quantites.. tis not really scientifc.. and prob screwing your heart rythmn if your not careful.