Toss enough ice into the highball glass so that it is filled to the top.
Take the grenadine. Use the jigger to measure 1 oz of grenadine and toss it into the bottom of the glass.*see below if you need an alternate measurement to ounces.
Take the coke. Use the jigger to measure 6 oz of coke and toss it into the glass.Note: if you want to skip measuring the coke, you can. Just pour it straight into the glass to top it off.
Place the bar spoon into the glass and stir well.
Pop a maraschino cherry on top of the drink and enjoy!
Notes
Measurements: if you don't have a jigger to measure in ounces, then use the following.