Hi, I dont know if this is the cheapest, but I always wanna buy pomegranate juice drink as they are generally called super juice. It is found to be super high in Anti-oxidants (a substance that lower colestral as well as preventing cancer cells from developing *thanks gobofraggle for correcting)
It is £1.00 and it tastes great, I wanted to use the chance to promote to all.
Any type of these juice are all £1.00 each.
This is the cheapest I found, if you found cheaper please let me know but dont freeze me! :)
Take care all!