Old but still topical:
http://coffeefaq.com/caffaq.html
Cup of coffee 90-150mg
Instant coffee 60-80mg
Tea 30-70mg
Mate 25-150mg
Cola 30-45mg
Chocolate bar 30mg
Stay-awake pill 100mg
Vivarin 200mg
Cold relief tablet 30mg
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I have gained this from philosophy: that I do without being commanded what others do only from fear of the law. - Aristotle
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