Sosoon via Amazon offers the Sosoon 16" Laptop Backpack in Black for $21.99. Coupon code "IDSGLIL3" cuts it to $15.39. With free shipping for Prime members, that's $2 under our December mention and is the lowest price we could find by $13. It features an opening for USB charging, hidden anti-theft pocket, and space for a laptop with up to a 15.6" screen. Deal ends December 31.