This made me think of this story from a while back.<p><a href="https://mashable.com/2016/05/12/china-bottled-air-demand/" rel="nofollow">https://mashable.com/2016/05/12/china-bottled-air-demand/</a><p>Curious I googled the company to see if they still existed. Vitality Air appears to be doing well.<p><a href="https://vitalityair.com/" rel="nofollow">https://vitalityair.com/</a>
Anyone else SCUBA? I'd rather do a EAN36 for about the same price, but would last me longer.<p><a href="https://en.wikipedia.org/wiki/Nitrox" rel="nofollow">https://en.wikipedia.org/wiki/Nitrox</a>