27 Perfect Gifts For The "Hitchhiker's Guide" Fan In Your Life
Assuming they already know where their towel is.
3. This mug for the grumpiest android you know.

http://www.redbubble.com/people/jskerberdesigns/works/12952119-dont-talk-to-me-about-life?grid_pos=71&p=mug

http://www.redbubble.com/people/jskerberdesigns/works/12952119-dont-talk-to-me-about-life?grid_pos=71&p=mug
Get it here.
9. This t-shirt declaring your support for the galaxy's greatest president.

rexraygun / Redbubble / Via redbubble.com
Buy it here.
12. This adorably apocalyptic phone case.

David Benton / Redbubble / Via redbubble.com
Get it here.
14. This shout-out to everyone's favorite supercomputer.

Corinna Djaferis / Redbubble / Via redbubble.com
Available here.
20. This gorgeous throw pillow.

Jarriet / Redbubble / Via redbubble.com
Available here.
26. This travel mug from the restaurant at the end of the universe.

http://www.redbubble.com/people/adamgamm/works/11097646-milliways-the-restaurant-at-the-end-of-the-universe?grid_pos=3&p=travel-mug

http://www.redbubble.com/people/adamgamm/works/11097646-milliways-the-restaurant-at-the-end-of-the-universe?grid_pos=3&p=travel-mug
Buy it here.