Was headed to air gas in graham tx to get a small bottle of nitrogen filled up....someone had said that was the only place to get filled in town...never been there before...I carried small bottle inside where I was swiftly turned around and told (extremely rudely) that I could not bring bottle inside.......I do realize my sale was not going to amount to a lot but wow.....it was like getting hit in the face with cold water.....lady could definitely use a little customer service/PR schooling....I will Have my nitrogen filled elsewhere....good day...