Minimum 1 liter of liquid. Usually about 50/50 water/OJ. If there's no OJ I will drink full strength Gatorade.

Whole grain museli bars(not granola), bananas.

Find something that is salty that you like. Salt is huge in hot weather. After the ride it is a good idea to eat something really salty like crackers or chips.

People often forget about Potassium(OJ & Bananas)

You need to drink 750-1000ml per hr when exercising. If you start without a good drink you can only ride 1 1/2 hrs with (2) 750ml bottles. On a hot day you might ride 1 hour.