If you refer three friends.. (give 3 emails) you will be able to print out a coupon for 3.50 off your next bottle at any particpating stores. (Grocery?)

http://sdm3.rm04.net/servlet/MailView?ms=NDE2NzE2S0&r=MTc5MDc3NzA5MQS2&j=ODE0NjQ5MAS2&mt=1

You do not need to do the referals to get the coupon. :)

http://www.optifree.com/us/registration1.asp