3 British teenagers invent colour-changing condoms that detect STDs

Muaz Nawaz, 13; Daanyaal Ali, 14; and Chirag Shah, 14, explain their invention to Dr. Christian Jessen at the TeenTech competition.

Three British teenage boys have won a TeenTech Award for inventing a condom that changes colours if it comes into contact with a sexually transmitted disease.

The 13 and 14 years old, Daanyaal Ali, Chirag Shah and Muaz Nawaz, students at the Isaac Newton Academy in London, dubbed their invention the "S.T.Eye"

"We created the S.T.Eye as a new way for STI detection to help the future of the next generation," Ali, 14, said in an interview posted on the TeenTech website. "We wanted to make something that made detecting harmful STIs safer than ever before, so that people can take immediate action in the privacy of their own homes without the often-scary procedures at the doctors. We've made sure we're able to give peace of mind to users and let people act even more responsibly than ever before."

"Once the fluids come into contact with the latex, if the person does have some sort of STI, it will cause a reaction through antibodies and antigens hanging on to each other, which triggers an antibody reaction causing a colour change," Ali told the BBC.