I'm an English teacher so I spend most of my day speaking and talking to students and staff. My hydro flask is perfect for keeping me hydrated. I love how my water stays cool though out the day, and doesn't sweat all over my desk, especially during the the summer time. The size is perfect for when I teach back to back classes and don't have enough time to refill my water bottle. The color is just an added perk that makes my hyrdo flask stand out from any other tumbler. I highly recommend buying one for yourself!