The Undelete Pill is a special item in World of Goo. It appears as a red pill labeled "undelete*", and exists in only one level, Deliverance, at the end of Chapter 4. The Undelete Pill is used in the Recycle Bin to reverse the deletion of years' worth of MOM's spam messages. With the millions of spam messages upon them, World of Goo Corporation explodes, one moment after a comedic computer terminal displays the message "new mail!"