Ha! Haha! HAHAH! That finally makes sense. Somebody jumbled the threads of fate! That's why clicking "last page" sends us into vacuum and your shoelaces stay unlace.
Asking what 42 is is ridiculous. The real question would be, what isn't 42? All that is real can be devolved to 42. For example, what is 71? Why, just divide it by the simple number of 1,69047619047619 and what do you get? 42.
Soda water comes from the land of Pop, which is currently in a war between Soda and Coke because they can't agree if the correct word for the carbonated drink is pop, soda or Coke.