Clifshots here. I love the Mocha Mocha which has caffeine, the Sonic Strawberry tasted like strawberry jam to me - and it has caffeine also. I did Not like the Cola Buzz....it tasted like a flat gooey Coke! My fav non-caffeinated are Chocolate and Vanilla. ClifShots has the no litter packet where the top stays attached to the packet but I would be very interested in a flask. My hands and Face get sticky from the packets, and then so do my pockets when I stuff the empty packets in them. It might be fun to get a flask and mix caffeinated and non-caffeinated flavors together and then just take a shot whenever.
When I did my century, I ate every hour alternating between enery bars and gel and eating a caffeinated gel every other time. ClifShots uses rice syrup instead of maltodextrin (which can upset my tummy).