Ted Schnieder wrote an answer about Backcountry Access Float 18 Winter Backpack - 1010cu in on November 29, 2011
The pack does ship with the cylinder filled, but there is a hazmat fee of 25 bucks on top of the normal shipping and handling charge. I requested that mine ship empty and I got it filled at a scuba shop to save a bit of money. Depending on your situation it might be better to just get it shipped full though. You cannot travel on airlines in the U.S. with a full cylinder. If you are traveling internationally you can request to be able to carry it in your checked baggage but you need to fill out a form which you can get off BCA's website.