I drink ice water all day long. I'm a teacher, so I don't have much time between classes to get ice. The EcoVessel cup keeps ice for hours. The brushed surfaces don't show finger marks. The lid easily slides closed to protect the papers on my desk in case of accidental knocking over. The size makes it comfortable to hold. I'm very pleased with my purchase.
I have a water bottle I bought several years ago. When it developed a leak, the folks at EcoVessel fixed the problem quickly.