If your dear geek enjoy getting wasted then this is the gift you should get them. Not only they'll use it but think of you every time they get drunk. At least while they're conscious, that is. Suitable for all events where getting wasted is preferable.
This creative backpack is covered in reflective triangles that shine when light gets on them. With this design, your little princes will be visible and safe even at night. Or you can get one for your girlfriend because she probably likes shiny stuff..