I found an awesome idea for the geeky warm beverage enthusiast: Geeky Mug Cozies, by Cuddlefish Crafts.  (Note: only some of her cozies are geeky).

When wrapped around coffee you are, look this good you will not.

Don’t use the red one. You’ll lose your coffee.

While Cuddlefish has not provided a pattern for sale here, an enterprising (ba-dum) person can probably figure out how to make one of these.  Or, you can do a Google search for “Crochet coffee cozy” and find a list of tutorials on how to make these (including a YouTube video or three).   From there it’s just making little embellishments to geek them out.

-Confusion is a state of mind, or is it?