Serfas' Magnetic Stem Bag is excellent for commuters, tourists, triathletes, and everyone else, because it lets you keep food and gear where you can easily see and access it (the bag sits just behind the stem, on the top tube). This fine bag quickly attaches to your frame and stem with 2 Velcro straps and has a mesh top with a magnetic closure for easy access to your gear.
Also available in Gray and Red (images unavailable from manufacturer).
Dimensions: 8.75 x 3.5 x 2 inches
Capacity: 61 cubic inches