Astronaut William McArthur is brushing his teeth in the middeck of Space Shuttle
Atlantis during STS-74. Dental hygiene is basically the same as on
Earth. To the left, McArthur's personal hygiene kit can be seen fixed
to a middeck locker. The kit contains the personal hygiene items every
astronaut chooses to take with him. Personal preferences, such as
the brand of toothpaste, are accommodated if possible.