I, unfortunately, haven't found anything that's particularly convenient or easy when I'm running at my max trying to keep in the pack :/

I do use HEED (electrolyte + energy) in my bottles, and I really like it, but there are times I'm just going too fast, too close to get to my bottles confidently, and also I find I tend to need "solid" fuel even with this on rides over about 1hr.

I just recently switched from Power bar "Smoothie" bars (basically fruit leathers), which were great for nutrition/energy but hard to eat (require quite a bit of chewing, and sometimes hard to get a bite).

Now I'm trying several different gel chews to see if those are easier. Currently on Cliff "Shot bloks". Much easier to eat than the Power Bars, but I'm not convinced they provide as much energy/fuel, and unfortunately they are more expensive Still have the problem of being going too fast or too close to reach back and grab them. That's just something I guess I'm going to have to work on.

I'll be following this with interest to see if someone has come up with the miracle cure, LOL.