I used this bottle for my trip overseas. It was constantly filled with cold water which was amazing for my trip to Asia. The water stayed cool for nearly a day even when it was sitting out in the harsh sun. I compared the bottle to my friend which was refilled at the same time and the Chute was noticeably colder.
The negative thing was that the bottle started to leak after 3 weeks of use. It might be an unlucky batch but I was unable to stop the bottle from leaking.