Combine lime juice, double simple syrup, tequila, triple sec, and enough water to bring total liquid to 3 cups. Pour into an 8-by-8-inch glass dish and freeze. Scrape the granita with a fork every hour until slightly slushy and completely flaked, usually about 3 hours. Enjoy!

Granita keeps surprisingly well in the freezer—for days and days, making it an ideal make in advance refresher.