Purcell describes a new product called "O2 for 2" ($2195 retail). It is portable but still can be used by two people simultaneously. "I was invited recently to a cigar bar in Las Vegas," she tells me, "and I hate the smell of cigars. So I took an O2 for 2 with me and inhaled oxygen while I was there. A woman who was looking very tired and rundown tried it too. In a matter of minutes, she was rejuvenated and looked and felt great. A guy who owns another bar saw that. He took my number because he wants to order an O2 for 2 for his place."