2 limes, quartered
1/3 cup lemon juice
1 (1 ounce) package instant lemon zest
2 (4 ounce) jell-O
Stir lemon juice into juices, such as lemonade or lemon-lime flavored carbonated beverage. Do not thin lemon-lime soda.
Fill and seal bottle with lemon-lime soda. Chill well.