Although I am a fan of Camelbak and consider their products excellent, I was not particularly satisfied with this thermos. While it has very good construction quality and is easy to clean without any odor, I think it does not keep the temperature well for ice-cold water. In the summer, I fill it with cold water and add ice cubes, and in 3-4 hours it becomes lukewarm. Without being exposed to the sun. I would not buy it again.