They are selling packs of 8 cans (6 cans + 2 FREE) for 99p!
Works out at 12.375p per can!
Just been to 99p store in Swansea and they were selling 8 cans of 7up and tango lemon for 99p, not sure if nation wide, but worth a look.
7up Best Before Dec 2010
Tango Best Before Unknown