Price Drop! This Shrradoo 50-Liter Travel Laptop Backpack drops from $45.99 to $31.98 at Tubu via Amazon. Shipping is free. This is $4 less than our last mention, and the best price we could find compared to similar ones by at least $10. This multiple pocket backpack features a separate protective compartment for laptops up to 17". It unfolds to 180 degrees and features a built-in USB port and a luggage strap. This backpack rates a 4.8 out of 5 stars in over 4,100 reviews. Sales tax is charged in most states.