Somewhere between 20 and 30 percent of supposedly decaffeinated coffee and tea is actually fairly high in caffeine, but a new test kit can help people tell the difference. A strip of paper soaks up fluid from a sample, and antibodies in the strip produce colored lines if the sample contains caffeine. The antibodies were designed by the test’s manufacturer, Silver Lake Research, which also has antibody tests for contaminants in food sources and water.
Credit: Joshua Scott
Product: D+caf Test Strip
Cost: $9.95 for a package of 20 strips
Company: Silver Lake Research
Other products in this section:
Become an MIT Technology Review Insider for in-depth analysis and unparalleled perspective.Subscribe today
A stretchy stick-on patch can take blood pressure readings from deep inside your body
The flexible stamp can collect data that usually requires bulky, invasive equipment.
Clearing out old cells might help the brain
A popular anti-aging strategy keeps mice from getting senile.
“Hundreds” of crimes will soon be solved using DNA databases, genealogist predicts
CeCe Moore’s company has been helping police departments solve cold cases by uploading crime-scene DNA to public genealogy databases.