Tom Bihn "Shop" Bag (small)
I have had this for a few months and it is great for carrying a couple of bombers or bottles of your favorite liquids along with some snacks. It has two pockets on the sides perfect for bottles. It is really light and folds down to be very compact. But after the surgery I have found this bag to be absolutely indispensable! I can hang it around my neck (the padding on the straps keeps it from hurting) and carry stuff from one place to the next (fits ipad, Macbook Air 11", bottles of water, sandwiches, etc.) Highly recommended if you are on crutches.