Pursuant to this rant - many triathletes and runners have gone way overboard on carrying water. It's OK to end a race or a workout a little bit dehydrated, folks!
Next time you're tempted to carry an extra water bottle, remember:
24 ounces of water plus bottle weighs 1.6 pounds. Or over 700 grams.
How much do people spend to carve 700 grams of weight off their bike? Hundreds and even thousands of dollars!