I don't commute very often (I work at home but keep an office in the city) so I don't own any travel tumblers. I'm thinking I should get one for the upcoming cold autumn drives into the office. Here's some from Sourpuss that are tempting me:
I love the bratty look on the face of this Frankengal tumbler!
Here's a slightly spooky, adorable sugar skull tumbler. Not very dark, I admit!
The sugar skull tumbler also comes in blue.
Enjoy your coffee (or perhaps hot tea!)