Years of prototyping and development went in to the Wolf Tooth BarBag Nutrition Storage Pack. Though its uses are not limited to nutrition - it is great for phone wallet storage on a commuter! It really shines when riders need to be able to select their nutrition and still keep one hand on the handlebar. The BarBag flips open with one hand, and to close it, a simple flick or even the wind pushing it will provide enough to securely close the bag. The magnet velcro latch does all the work to seal up this bag well enough to tolerate the nastiest of crashes without ejecting any contents (this has been tested)!