I went out to lunch yesterday. At lunch I ordered a coke. I took it with me when I left the restaurant and drove home. Being the lazy man that I am, I didn't bring the cup in with me when I got home.
This afternoon, about 24 hours after I had gone out to lunch, I got back in my car to run some errands. I looked down at the cup of coke, expecting to see all liquid. Much to my surprise, it looked as if I hadn't left more than 5 minutes ago, because the ice was still floating at the top.