article_snippet.sent: Three first year students, (from L-R) mechanical engineer Mike Hua, bioengineer Andy Zhang and computer scientist Greg Allison, came up with Their invention, Three first year students, (from L-R) mechanical engineer Mike Hua, bioengineer Andy Zhang and computer scientist Greg Allison describe as 'simple and elegant' The trio, made up of computer scientist Greg Allison, bioengineer Andy Zhang and mechanical engineer Mike Hua, currently has a functioning prototype, that has produced a numbing effect in just 60 seconds. '
article_snippet.sent: Three first year students, (from L-R) mechanical engineer Mike Hua, bioengineer Andy Zhang and computer scientist Greg Allison device is 3D printed and consists of two sealed chambers containing the chemical ammonium nitrate and water, ' Mr Hua said. '
article_snippet.sent: Three first year students, (from L-R) mechanical engineer Mike Hua, bioengineer Andy Zhang and computer scientist Greg Allison then numb the skin by contacting Our device's metal surface to the patient's skin.'
article_snippet.sent: Three first year students, (from L-R) mechanical engineer Mike Hua, bioengineer Andy Zhang and computer scientist Greg Allison are targeting anyone who has to get an injection, which is nearly everyone,' Mr Allison said. '
article_snippet.sent: the device is 3D printed and consists of two sealed chambers containing the chemical ammonium nitrate and water.
article_snippet.sent: At the end of the day, what We're creating is a self-contained device with a very cold contact surface, and there are many applications for that,'
article_snippet.sent: Mr Zhang, said: 'The materials that we use are relatively inexpensive and found in abundance: plastic, rubber and metal.
article_snippet.sent: The team is currently in the process of applying for a provisional patent for the device, and the students hope to continue the students work together in the students spare time when the students return to Rice in the students second year. '
highlights_snippet.sent: Invention costs around $2 to make and could help millions terrified of pain .
  
highlights_snippet.sent: Three first-year students behind invention say it could work for tattoos too .