Working in the Healthcare field, I'm always on thr go and I never bring a water bottle to work with me because my ice melts too quickly so I don't want to drink it anymore. This water bottle is freaking awesome because it'll keep my ice intact for literally hours on end like literally up to atleast 6 hours. It's also made heavy duty and I only know that because it's had its fair share of falls. I literally walk around work with it all day and it's big enough I know I'm getting a good amount of water in but not so big that it's a hassle to carry. Highly reccomend!!