Metrecal (note spelling) was originally a diet product “containing powdered skim milk, soybean flour and corn oil and fortified with vitamins and minerals”. Later, the product line expanded to include an undoubtedly tasty tuna-noodle concoction. Metrecal was launched in 1959, the month after I was born, and vanished from the shelves during my freshman year in college.
ETA: Your screen name’s inspiration undoubtedly would, had he bought Metrecal, been among the users who added liquor to make the product more palatable.