1 cup boiling water
1 (6 ounce) package cherry Jell-O®
1/2 cup tequila
1/4 cup triple sec
1/4 cup orange liqueur (such as Grand Marnier®)
Arrange 12 2-ounce plastic cups on a baking sheet.
Slowly pour boiling water over gelatin mix in a bowl while whisking. Continue whisking while streaming tequila, triple sec, and orange liqueur into the gelatin mixture. Pour mixture into plastic cups.
Refrigerate until set, 8 hours to overnight.