It's perfect for my wife, who is a librarian who works in a room that requires a fully-sealed drink container. We just got a second one in case she leaves one at work. It keeps her morning espresso hot all day and never spills in her bag.
Like everything about this mug. I mostly drink iced coffee. It keeps my iced coffee at very cold temperature throughout the morning . The little bag is also very handy .
This is now my go-to mug at home or on the go. Even with the lid off, it keeps my coffee nice and hot while I'm working from home. Love the feel of it when I sip, too!
Fun fact: I poured cold water into my Carter mug from our water cooler and then sealed it with the Carter Move lid. I opened it up a little while later to find ice had formed across the top of the water's surface.