I went to Safeway. They had prepared jello in those tiny containers, a 4-pack having 2 orange and 2 red. I bought it thinking that maybe I would be able to use the orange one. I tried both and did not like them.

I also bought mixes in all colors other than red. I have just made and chilled the green jello. It is seriously tasty!!

And making it was super easy. So at least in that sense I am prepared: I will buy the green mix and mix and chill enough to have a virtually unlimited supply for the day before and day of the procedure. My procedure will be at 5PM.