I’ve been through so many of these types of commuter thermoses (thermosii?) and this is hands down the best I’ve ever used. From zojirushi to hydro flask, Coleman, and Yeti. This one doesn’t leak, keeps my coffee hot, it’s easy to drink out of, easy to make a pour-over brew directly into it on the go, it’s lightweight, it fits in my backpack side pocket, my cup holder in my car, and it’s really easy to clean.If I could nitpick, I’d make it a half inch wider in diameter just to make it more snug in the car cup holder and to fit my hario v60 a little better, but I’m not taking a star off for that. This is the mug I’ve needed for the past 20 years and now I have it.