So all hypochlorous acid sprays are bot created equally. The shelf life is something you need to consider when purchasing! I go theough a bottle a month so no biggie for me but if youre looking for a longer shelf life then @Kanzen Skincare hypochlorous spray lasts up to 12 months from opening! #hypochlorousacid #hypochlorousacidspray #shelflife #kanzen #skincare #skincaretips