The splash guard actually works—I tipped it sideways in my bag and didn't get a single drop on my laptop. Coffee was still warm three hours into a meeting-heavy morning, which never happens with my old tumbler.
The snap-in splash guard is the detail I didn't know I needed—no drips on my shirt during the commute, even over bumpy roads. It slides into my car's cup holder without wobbling, and my coffee was still hot two hours into the morning.