Jason B. wrote a review of CamelBak Thermal Control Kit on August 30, 2006
While I've never used the normal tube, I find every first mouthful hot. Maybe this thing is more suited to cold weather use; i.e. not freezing. Once you clear the tube the ice you filled your pack with before putting in water has the water ice cold all day, while still melting quickly enough to never run out of water. I work in ninety+ weather, so it may be that I'm expecting too much. But for twenty bucks I wish that I had bought a cleaning kit instead.