caffeine test strip. Reportedly, these strips keep the paranoid abreast of the truth whenever they venture out for a decaf drink; java sippers simply insert a tester into their beverage, wait for it to grow intolerably cold (or 30 seconds, whichever comes first) and then view the findings. The creator proclaims that they're 98% accurate for detecting greater than 20-milligrams of caffeine per 6-ounce serving, but we're not willing to pay $9.95 for a 20-pack in order to find out.
D+caf caffeine test strips makes sure your decaf is decaf
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