Don't be put off by the fact that the antibodies are derived from llama blood. If you're trying to avoid caffeine, this new invention could be a great way to test your drinks for its presence. (Or if you're like me, to make sure the barista didn't sneak you the decaf.):

Chemists at Washington University School of Medicine in St. Louis are developing a quick, "dipstick" test that they say could represent the first home testing kit to detect the common stimulant...

"We envisioned that a simple method to measure caffeine, even in hot beverages, such as coffee, would be of value to individuals and institutions wanting to verify the absence of caffeine," said study leader Jack Ladenson, a chemist at the university. "This will greatly assist individuals who wish to avoid caffeine."

Ladenson said he is developing test strips treated with a specific antibody that react by changing colour in the presence of caffeine.

This seems like a simple idea, but coming up with an antibody that would remain stable even under high temperatures was apperently a difficult feat.

[Via Slashfood.]