AltaTac via eBay offers the Coleman Max Lightweight Hydration 14-Liter Backpack in Orange, model no. 14L-2000008728, or Black, model no. 14L-2000008729, for $19.99 with free shipping. That's $3 under our mention from four days ago and the lowest total price we've seen for this backpack. (It's a current low by $35.) It features a 2-liter hydration bladder with Microban-treated anti-microbial bite valve, airflow shoulder straps, and adjustable sternum and waist straps.