Eric Bjerregaard, Of course coffee is not pure caffeine.  However, glyphosate is already diluted in products like Roundup.  So I will drink the diluted caffeine called coffee, and you will drink the diluted glyphosate called Roundup.  It might not have a great taste, so you may add chocolate or anything else to cover up the natural taste.  You can prove you stand behind what you say by taking the challenge, or you can show that you're not serious.