Pour 1 cup boiling water over half of the lime-flavored gelatin in a glass measuring cup; stir until dissolved. Stir in 1/2 cup tequila. Pour lime and tequila mixture 1/3 of the way up twelve 2-ounce cups.
Refrigerate until set, about 4 hours.
Combine 1/2 cup boiling water and orange gelatin mixes in glass measuring cup; stir until dissolved. Stir triple sec into orange gelatin mixture. Remove cups from the refrigerator. Pour an orange gelatin layer about half as tall as the lime layer into each cup.
Refrigerate until set, about 4 hours.
Combine 1 cup boiling water and remaining lime-flavored gelatin in glass measuring cup; stir until dissolved. Stir in remaining 1/2 cup tequila. Remove cups from the refrigerator. Pour a layer of lime and tequila mixture on top about the same size as the bottom layer.
