There are entirely too many "i's" in this drink name.
Another delightful rum drink said to have originated in Cuba is the classic daiquiri. It was also one of the favorites of the prolific drinker and writer Ernest Hemingway, so how can it be a bad thing? I have had a few of these lately because I am trying to perfect the balance of flavors for my taste. That's the great thing about mixing your own drinks; you are allowed to change them to fit your needs. Ernest did. You should too. Throw all kinds of crap in there until you find a drink you love.
*a classic daiquiri does not take a trip through your blender.
1 1/2 oz. high quality light/white/silver rum (This is the only spirit in here. Make it a good one.) We used Bacardi.
3/4 oz. lime juice (Most recipes stress fresh limes. Try if you can. If you can't, who cares? It's your drink.)
1/4 - 1/2 oz. simple syrup*
Pour ingredients into a shaker with ice. Shake that mofo. Strain into a chilled cocktail glass...or a mason jar...or a sippy cup - seriously, whatever works. Garnish with a lime wheel if you feel the need.
*making simple syrup is easy. Use equal parts sugar and water (how much depends on how much you need) in a saucepan. While stirring, bring to a boil and cook until the sugar is dissolved. Cool completely before use. Use within a week usually. Or you can bypass any real work for yourself and buy some.