Why does mineral water that 'has trickled through mountains for
Centuries have a 'use by' date?

Who was the first person to look at a cow and say, 'I think I'll squeeze these dangly things here and drink whatever comes out'?

Put a closed bottle to a bright, warm place (especially if the bottle is a plastic one), leave it there for three months and try it afterwards. It might taste ugly. Perhaps you can also see some sea weed (not very probable).
Bottles are not necessarily sterile.
And plastic bottles cause bad taste rather quickly.

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If every material thing is gone, my smile and my tears stay left.

Why do people have a need to answer rhetorical questions? (sorry, could not resist....)

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-Toast-
"It takes a lot of brains to enjoy satire, humor and wit - but none to be offended by them." -- Johnny Hart ("BC", cartoonist, 2000)
"Analyzing humor is like dissecting a frog: Nobody really enjoys it and the frog generally dies as a result." -- E. B. White

Was that so rhetorical??? Then forget the answer and continue wonderting and smiling

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If every material thing is gone, my smile and my tears stay left.