Sounds not too special, you say? Fire fighters and scuba divers use air in bottles… So what’s so whacky about this?
Well, the O2Supli are sold by 7/11 and Hakugen. Their purpose is to boost the Japanese workers when they are tired. Oxygen in bottles has been a recurring meme (and often joke) in dystopian and Cyberpunk fiction… So here we are, another little gem of “reality catches up to fiction”, even if the O2 in this case isn’t required for survival.
Akihabara News reports that a bottle of O2Supli costs 4.23 Euro.
(Via Akihabara News.)

Apparently it is possible to get high off these things. And they sell them in the mountains a lot for tourists who are not used to the thinner air.