Sports Oxygen Can, 95% Oxygen Concentration, 5L, 10 Bottles

Portable Oxygen Can
For exercise such as yoga and aerobics
For sports such as swimming and marathon
For improved concentration during studying, meetings, computer work, etc.

I purchased this online last year for a Mount Fuji climb.
I bought 10 cans for my family, but in the end, no one used them.
The film is still attached, but on one can, the film is slightly torn (photo 3). However, it has not been used.
All are new.

Please note that they have been stored at home for one year.

Thank you for looking.