Good for you and the environment, the Timbuk2 Hidden Brown Bag is the ideal "extra bag". Stash it anywhere and it will be there when you need a little additional carrying capacity. Not only does this snazzy little bag eliminate the need for paper or plastic grocery bags, it is also built of 90% recycled PET fabric (that means pop bottles).
Great bag a little long
This is a great bag you can tuck away into another bag and you can whip it out when you have a little more you need to carry. The bag is a bit long though and only floats about 5-6 inches off of the ground when I hold it in my hand. This could be because I am only 5'5". I would either want it to be a little shorter in the bag length or for the handles to be a bit longer so I can put in on my shoulder and carry it as a shoulder bag.
