I agree with what one poster said...there's a big difference between 35 miles and 50 miles...at least for me there is. For a 35 mile ride, I don't need any food at all during the ride...I just eat something beforehand, and I'm good. But for 50 miles, I would likely bring 1 or 2 mini Luna or Clif bars (80-100 cal) and maybe some chews (Shot bloks or Honey Stinger chews). However, I usually don't consume all of that. For me, 1 bottle (21oz) will last me for a 35-50 mile ride. Anything over that, and I'll stop at a gas station to refill my bottle.