In a medium bowl or large (4-cup) measuring cup with a spout, whisk together blue jello mix and 1 cup of boiling water until jello is fully dissolved.
Once the jello is fully dissolved, stir in the cold water, pineapple juice, Malibu, and blue curacao. Mix until combined.
Carefully pour the mixture between small plastic shot cups. Fill just under the top, so they don’t spill.
Transfer jello shots to the refrigerator and chill for 4 hours until set.
Just before serving, top each jello shot with a maraschino cherry and a small piece of fresh pineapple.
Notes
Storage:Jello shots will keep in the refrigerator for up to 7 days. Cover if you use containers that do not come with individual lids; otherwise, pop the lids on for storage. Do not store with fruit pieces on top of the jello.Notes:Use up to 1½ cups of alcohol for a stronger jello shot. For a lighter jello shot, you can use additional cold water or pineapple juice and less alcohol. You need four cups total of liquid to combine with the jello mixture.Keep jello shots refrigerated until consuming.The jello shots may firm up faster than 4 hours. If you are using shallower shot glasses/cups and if you use icy cold water for your cold water, they will not take as long to set.Transfer jello shots in and out of the fridge on a baking sheet or large flat platter.The ratio of each type of alcohol and fruit juice will vary the flavor somewhat - you can adjust however you like. Do not use more than 2 cups of alcohol to ensure that the jello still sets up properly.