+1 on the camel back's filled with ice. I take two bottles of 50/50 gatorade and a 50 oz camelback filled with ice and water. I drink the bottles first then sip the ice cold water thru the end of the ride. If the ride is longer than 50 miles, I'll stop somewhere and refill the bottles + drink some gatorade. I'll also eat early in the ride and during the break.