Harvard Cooler Classic is restoring smooth cocktail at 1.8 standard drinks. Shaken with 60ml brandy apple calvados and 30ml lemon juice with 20ml grenadine as well as 180ml syphon seltzer including 50ml ice and served for or with tiffins. Just add the ice into shaker then add all ingredients to shaker, less soda and shake ingredients together until mixed. Strain into glass and fill glass with soda water and served in a highball glass cold.