One of the best lessons that I have learned is that if your ride is short enough that you don't need to take any rest breaks then you can get away with just pure water in your water bottle and make up the lost carbs at the end.If you do need to take rest breaks take them at a convenience store where you can get some cold Gatorade (for you short term energy needs) and some complex carbos as well such as a granola bar (for your longer term energy requirements).