I need help putting the finishing touches on my boyfriends v.day gift?

SO for valentines day this is what I had in mind for my bf: he just went back to school so hes always saying he needs a backpack. So I was think I would give him a nice backpack (nike, under armour..) and then fill it with 168 hershey kisses (a kiss for everyday we have been going out) and then I made a mix cd of all the significant songs from our relationship...what else could I add to the backpack???