looking to buy my first welder

I think each state is different. In Fl,it has to have a R stamped on the neck to be a owner bottle If I recall correctly. Best thing to do is call your local welding supply shop and ask him how to identify an owner bottle. I and others have been burned in the past on this. Problem is if it is a company bottle(which it is usually stamped around the neck) nobody will fill it but them. Then they will want you to rent or lease it from them.