Hygiene on the move

Hello, Since I will finally drive a truck from the end of February a few more practical questions ask for me: How do you do it with the hygienic matters on the way? For brushing your teeth you could buy a 6er 1.5l water package, but to take a shower with it could become a bit more difficult. And I wanted to avoid becoming a cliché-deepening specimen of truck jockey: with jogging pants, flip flops and greasy hair at the wheel …