COPD & Emphysema Support Group
COPD is a progressive disease characterized by airflow obstruction or limitation. Emphysema is characterized by loss of elasticity of the lung tissue, destruction of structures supporting the alveoli and of capillaries feeding the alveoli. Both have symptoms that include shortness of breath, among other respiratory troubles. If you are a COPD or Emphysema sufferer, join...
I have the US $23.95 glass one on this webpage.
http://www.tinashomecare.com/oxygen_therapy_accessories.htm
But you can get a smaller one somewhere else for US $11.00.