The Finnish Long Drink, also known as a Lonkero, is a popular Finnish highball that originated at the 1952 Helsinki Summer Olympics and has recently gained popularity in the United States. It's traditionally served in a tall ("long") glass, hence the name. I find that Fresca and white grapefruit juice give this drink the most authentic flavor, but you can use ruby red grapefruit juice for a sweeter, less tart flavor.