+ today <= expire_on
+ end
+
+ def remind(reminder)
+ reminder.send(self)
+ ReminderDb.instance.record(self)
+ end
+
+ def reminded_on
+ ReminderDb.instance.last_reminder(self)
+ end
+
+ def create_receipt!(amount)
+ require 'nos_oignons/receipt'
+
+ receipt = Receipt.new(self, amount)
+ receipt.create!