You can send for codes. The ones on the products are unique numbers.

print your name, address, daytime telephone number, email address, on a 3”x5” paper and mail in a business size (#10) envelope to ~~~ Dean Foods – Start Right, End Right Sweepstakes, c/o YTBS, Inc., 2000 Sierra Point Parkway, Ste.801, 9th Floor, Brisbane, CA 94005, ~~~ to be received by 2/28/2009. Each 3”x5” paper must be mailed separately. No copied, mechanically reproduced or facsimiles of 3”x5” papers will be accepted. Limit one request per stamped envelope

Also........You are required to actually HAVE the code material, to send in as verification, if you win.

7. VERIFICATION:  Sponsor reserves the right to request that participant forward to Sponsor proof of eligibility in a form determined by Sponsor and/or the Code(s), and materials on which Codes are printed (collectively “Code Materials”) used to participate in the Promotion. Failure to comply with this request within the timed stated in the request may result in disqualification. Validation Procedure:  All Code Materials may be reviewed for authenticity.