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I know refrigerators are coming out with computer screen panels to list groceries needed, how about installing a printing machine to the panel. Note the groceries needed, then when you are ready to get your groceries you print a list that prints on thermographic paper. Sort of like a cash register reciept, thermographic paper is used by heat so there is no re-inking to be done. All that has to be done is reload with a roll of thermographic paper.