Infused liquors are the new medium for creative expression in the realm of cocktail mixology, and vodka is the ideal spirit for experimentation, as any number of ingredients easily infuse into this neutral-tasting liquor and shine through with clarity. Beyond the basic citrus infusions, you can even take the concept to the next level of creativity by using, for example, a combination of tropical fruits, or adding fiery bite with hot peppers. Subtle herb infusions perfect for exotic vodka martinis are obtainable with just a sprig or two of rosemary or basil. Infusions are surprisingly easy to make, with an end result of wonderful depth of flavor. These are exceptional when served chilled and neat, and are handy for quick cocktails with nuance and complexity. Basic Infusion Guidelines

1. Use a clean, large (at least 1.5-liter) glass container with an airtight lid for your infusion.

2. Start with a 750-ml bottle of good-quality vodka, and use fresh spices, herbs, or ripe fruit; the average yield will be about 3 cups.

3. Save your original bottle; you will need it to strain the infused mixture into.

4. Infusion times vary depending on the ingredient. Strong flavors like lemon take less time to steep (24 to 48 hours), while milder flavors such as raspberry or pineapple may take 1 to 2 weeks to fully infuse.

5. Some ingredients may break down as they stand, requiring the infusion to be strained through a wire-mesh strainer lined with a coffee filter or cheesecloth.

6. Infusions are best stored in the refrigerator; chilling helps preserve the flavors longer than if kept at room temperature.