Newegg offers the Timbuk2 Slide Backpack for MacBook in Black, model no. 431-3-2099, for $39.99. Coupon Code "EMCPCGW73" drops it to $27.99. With free shipping, that's $39 off list and the lowest total price we could find. Designed specifically for the 15" MacBook Pro, it should also accommodate most 16" laptops. It features an internal organiser, weatherproof port for headphones and custom-fit strap. Deal ends August 6.