I'll Mark it on ice

What does "I'll Mark it on ice" mean and come from???

A little context might be helpful. SS

I am familiar with the expression: Write it on ice. To mean that the documentation of the topic is worthless because when the ice melts it will be gone. Ex: Bob makes a promise to Joe, but Joe knows that Bob will never fulfill the promise, so Joe says (or thinks) I will write it on ice.