Step 1

Using a vegetable peeler, remove peels from lemons, being sure to avoid any white pith, to yield 10 1/2 ounces lemon peels. Place peels in a 3-quart jar with a hinged lid. Reserve remaining lemons for another use. Pour alcohol over peels, making sure peels are submerged. Fasten lid on jar, and let stand in a cool, dark place 24 hours.

Step 2

Line a wire-mesh strainer with cheesecloth, and pour lemon mixture through strainer into a large pitcher. Discard solids. Repeat straining 1 time.

Step 3

Stir together 51/2 cups water and sugar in a large saucepan over medium; simmer until sugar dissolves, about 5 minutes. Add to infused alcohol, and stir to combine. Pour into sealable sterilized bottles, and cover tightly. Store at room temperature. Chill before serving.