Nelson Rigg CL-1060 Sport Tail/Seat Bag <--- Link to product
I was searching for a tail bag that would be able to fit my lunch box, hold a few other items, and look good. This tail bag works great.
I was able to secure it to the seat, avoiding the need to tie it down to the rear fender and passenger peg supports. It works great, I am able to put it on and take it off in seconds.
It is expandable and includes a built in rain cover ( I might remove this because it takes up space in the bag).