Have the one cup boiled water in a pot, pour in the two boxes jello. Stir or whisk until dissolved. Add the cold Tequila and stir to combine. Place plastic cups on a small rimmed baking sheet or platter. Pour mixture into a large heatproof measuring cup or if your pot has a spout use that. Pour into 12 cups about 3/4 the way up. Chill without the lids in fridge for at least 2 to 3 hours until completely set and solid.When ready to serve, you can take a lime and run around the rim of each cup or dip your finger in water or even a sticky sweetener like agave or corn syrup and then quickly dip the cup into the sugar or salt that you poured out onto a small plate. Turn back over and place a lime wedge over each rim.