Puking Pastille

Puking Pastilles are a type of sweet made by Fred and George Weasley to help students skive off lessons thanks to their Skiving Snackbox. Puking Pastilles makes the eater be sick within seconds of eating it. The orange ones are to make the eater be sick and the purple ones to stop them.

Behind the scenes
In the Harry Potter and the Order of the Phoenix (film); Ron, Neville, Ginny and Luna escape the Inquisitorial Squad by Ron giving them the sweets to make them sick, oviously makeing them unable to keep them under gaurd anymore.