I've put this handheld through some delightful stretches of hell, most recently a 35 mile ultra and an hourly ultra, plus tons of training runs both on pavement and off, and it performed wonderfully. It's comfortable and has enough storage for my car key, a gel or three, and my phone. Also, on shorter evening runs, it even accommodates my headlamp with enough cramming, which may tax the elastic at some point, but so far, so good. The bottle accommodates a goodly amount of water, or at least enough to take you from station to station, provided they aren't further than 7-8 miles apart or so. I prefer this to my soft flasks due to the ease of removing the lid and chugging liquids while still on the move. Lastly, let's face it, distance running is a smelly business, but, surprisingly, the mesh hasn't held stench like previous brands I've owned, so I'm no longer reluctant to bring the bottle to my lips thanks to the absence of the smell of something akin to a possum cadaver. Thanks for the excellent product and I hope to try more Orange Mud products in the near future.