Join Date: Feb 2008
Location: Paso Robles, Ca, USA
Yes the insulated drink tube is a must. I beleive it is actually sold as a cold weather option to keep the water in the tube from freezing, but works just as well to keep the water in the tube cool between slurps in the summer. The kit also includes a cover for the bite valve also to prevent freezing.
I fill my 100ml pack with ice, then top off with water, and its usually good for 200 miles in the heat. The regular intake of the H2O prevents the mind and body numbing of dehydration.
Paso Robles, Ca