Product: 4 pack of Grolsch
Watch the video then follow the text instructions (your name to the phone number on the card, standard rate) to see if you've got a free 4 pack of Grolsch. I don't know whether they are given away after 1st text or maybe need to text another 1, 2, 3 days (ie try again). Or if this is a 1st come 1st served, or random etc. But there are quite a lot of packs being "given away".
Also a competition for 1 years's supply (see http://forums.moneysavingexpert.com/...php?p=54391699)