I loved the vending machines for drinks!! I had at least one novel drink every day and enjoyed almost all of them. If you remember the name of the white grape drink you mention I’d love to look for it, it sounds great.
It was all Japanese, I only knew it was white grape because of the picture of a green grape cluster. The rest of the can was all manner of Japanese characters of random sizes and boldness with I think a green star-burst or circle and a horrible picture indicating the fruity chunky things (or thats what I tell myself it was).