I definitely agree with all of the comments from everyone. I'd also like to offer another option. I have a few customers that use Hammer Perpetuem, and have had VERY good luck. It is based on drinking a bottle every hour, and for the multi hour events, you simply use the chart supplied to mix bottles. ( it's based on your weight) Not only does it replace nutrients that you need, it's also becomes your drink AND your food.

I have just started using this myself, and it's great! I plan on using it this weekend on a multi hour mtn bike ride.

If any of you should try it, I'd be interested in your thoughts if you'd like to share.