Congrats for making it to day 23. IMO, green juice and canned soup are not ideal to break fast in even emergency. I would rather buy a few organic lemons, oranges and apples and keep them. If they bad in a week, so be it.
I would not eat canned foods even when I am not fasting unless they are lined with BPA free coating inside. But besides that they contain a lot of sodium and preservatives .