SwissGear 1775 Backpack (Black/Red) for $33.13 shipped. Here is a screenshot for your reference. It features a multi-panel airflow design, padded laptop sleeve with adjustable Velcro strap for laptops with up to 15″ screen sizes, a special pouch for MP3 players with headphone plug, and dual water bottle pockets. At the time of this post, 134 out of 148 customer reviews have given it 4/5 and 5/5 stars. Most places have it for about $68.