If in the market for a new, more sustainable backpack / laptop bag, try Stem the Tide's Medium Recycled Black Backpack & Laptop Bag made from recycled polyethylene terephthalate (RPET) which in this case comes from 23 500 ml, 16.9 oz, recycled plastic bottles.  Dimensions are 11.5" W x 17" H x  5.5" D.

The backpack / laptop bag is a multi-compartment bag equipped with a large main padded sleeve compartment for a 15.6" laptop featuring a USB easy charge port and 27" cable (power pack not included).  It also includes an organizer pocket with two divisions, an open and zippered pocket along with a detachable key chain, a back zipper pocket and two mesh pockets on each sides for storing a compact umbrella and water bottle among other items.  Padded shoulder straps and back padding offer extra back support and comfort along with a reinforced padded grab handle.  Designed with high quality water-repellent and tear-resistant material.  Stem the Tide Water Bottle must be purchased separately.

Stem the Tide is a company in the UK trying to raise awareness of the marine plastics problem by developing products that eliminate the need for plastics or use recycled plastics rather than add to the plastic volume that is overwhelming the ocean.  Some of the profits from these Stem the Tide water bottles go to benefit the Marine Conservation Society.  And with BeachNecessities.com donating 1% of it's annual revenue to beach and ocean conservation initiatives through it's 1% for the Planet membership, this is a win, win and win product.  We have become fast friends.