I've tried a few diff things.

Lara bars, and Cliff shot blocks for lytes are my two mainstays on the bike.

If I drink anything other than H2O, I just wanna puke.

My fav Cliff shot blocks are: orange w/half shot caff, margarita w/extra sodium... meh, sometimes cherry w/full shot caff.

Lara bars also come in mini sizes for about 100calories in a multi flavor box.