Ruck sack

For my German lessons (so I can move to Berlin next year) I have so many books and papers and rubbish to carry about the place that I've taken to using a ruck sack.  The same Jansport navy blue classic ruck sack that I used at school some, oh, 7 years ago (that LONG ago?!  arg!!!!).

My question is whether it's possible to wear a ruck sack without looking like Bella Swan?

Answers on post cards please.