A Yeti is a no go for me because they're so big, but I don't really use my travel cup for cold liquids. O can say that my zojurushi kept coffee hot for right at 18 hours once when I got busy at work and didn't finish my coffee and then didn't empty it until the next day. It fits easily in my travel bag where the water bottle fits. The top will lock so it doesn't spill and it comes completely apart for cleaning.