I went into my local supermarket near where i work today and they had 12 cans of pepsi or pepsi max on sale for £1.99! The RRP was £4.39 but this deals even cheaper than tesco's when they've got their buy one get one free deals on the 6 packs!
I think it said it's only a 4 day deal so be quick.
I bought a couple of cases as it works out about 16p a can!!
The supermarket is called Fishers BUT the "brand" is Nisa.
You normally find them in independently-run local stores.
I've been to a couple and sometimes they're in garages too.
They normally have a leaflet stating their deals on them.