I purchased a Simply Go Mini early this year and it is great. (much better than the backpack and bottle), My confidence to go out has skyrocketed, it is very convenient, using the the shoulder strap, when moving around or just the hand strap and shove it under the table when drinking and dining, no bottles moving around when driving. It was a great shock to be told I had to use oxygen for the rest of my life, then handing me two oxy bottles and a backpack, I was horrified. After the initial shock I got on the Net and purchased a Simply Go Mini from Easy Oxygen. They were simply great, best move ever.