Reebok has a good deal on the Style Active Foundation Backpack for $12.48 + free shipping for rewards members.
Be sure to apply coupon code BONUS at checkout!
A bit about this item:
Made for athletes on the go, this sturdy backpack provides a place to stow gear for the gym, work or school. It has a spacious main compartment with a padded sleeve for a laptop. Side mesh pockets hold water bottles.