W&A via Amazon offers the Outlander Large Packable Handy Lightweight Travel Backpack in 10 colors (Black pictured) for $20.49. Coupon code "CB8CPXF2" drops it to $15.49. Plus, Prime members bag free shipping. (Non-members can spend $49 to bag free shipping; otherwise, it adds $5.58.) That's the lowest total price we could find by $13. It features a front zip compartment and mesh water bottle pouches.