As one of its daily deals, That Daily Deal offers the Every Day Carry Tactical Assault MOLLE Loop Backpack in Olive Green for $19.99 with free shipping. That's tied with last week's mention and the lowest total price we could find by $7. The main compartment measures 18" x 10" x 5" and features a second large compartment, two smaller compartments, and padded shoulder straps.

Of note, you can purchase two backpacks for $37.98 with free shipping ($18.99 per pack).