O2 in a can

Now you can buy oxygen in a can from Seven-Eleven stores in Japan.

Why I hear you ask?
"The idea behind the product is to allow buyers to replenish their oxygen levels anytime they feel a lack of it due to stress, fatigue, or other factors"

I can see it now, people skipping the cafe and a coffee and heading down the the local convenience store for some air. The can delivers about 35 2-second long bursts of air thats 95% Oxygen. Available in Strong Mint and Grape flavors, they go for 600 Yen a pop.