This may be a few standard deviations from the mean, but I do not manage caffeine. I like the smells and the sounds surrounding the coffee making process, but I cannot drink it because of the blinding white caffeine headaches that follow. D+caf™ Test Strips enable you to test the caffeine concentration of coffee and tea.

• 20 single-use test strips
  
• 98% accurate for detecting “NON-DECAFFEINATED” beverages – above 20 mg caffeine per 6 oz. serving
  
• D+caf™ is a lateral flow immunoassay, similar to the technology used in home pregnancy tests
  
• D+caf™ Test Strips can be used on hot or cold beverages
  
• Produces a result in as little as 30 seconds
  
• Test beverage before adding milk, cream, powdered creamers, syrups or other additives.
  

I’m taking these the next time I visit my in-laws.

(See also: Caffeine Test Strips)