Kept my iced coffee cold through a whole afternoon of errands, and it slotted into my car's cup holder without any wobble. The straw lid is the real win though, no drips on my shirt on the drive in.
Aurora O.★★★★★
The straw lid actually seals, so I can toss this in my bag sideways without worrying about leaks. Ice was still rattling around in it five hours later, which never happens with my old tumbler.
Hazel★★★★★
Dropped this in my cup holder on a 2-hour drive and the coffee was still warm when I got there. The straw lid doesn't leak even when I toss it in my bag, which is honestly why I keep reaching for it over my old tumbler.