At Asda at the mo, they have Redbull 355ml cans at £1 each, I think you will find they are the cheapest around, well from what I have seen. There offer is a Rollback from £1.39 a can....bargain for those exams, games of football or even you're Fri/Sat night before going out!
I don't think it's available on-line.
First post, so be gentle!!