Was in local Tesco and saw this deal.
You pay full price but give them a >=15 word review of the product and send your receipt and they'll give your money back.
special packs of Alpen original (yellow top try me free) until 30/11/2015
claim your money back send in the flash from the pack
a short letter no less than 15 words describing your Alpen taste experience
receive a cheque for full refund up to £2.79 (no postage)
one per household