Steep: Combine oil and chosen flavor ingredients in a small saucepan. Set over medium/low heat and cook for 20 minutes to infuse the flavors into the oil (do not let it simmer or smoke).
Strain: Using a fine mesh sieve, strain flavor ingredients from the oil, then transfer oil to clean bottles.
Store: Label and store somewhere cool and dark until ready to serve.
Notes
For even more flavor, remove oil from heat and allow flavors to continue to steep for a few hours before straining.To decorate bottles with herbs (like rosemary or thyme), clean the herbs then dry well. Allow to hang somewhere dry for 24 hours to reduce moisture, then add a sprig into each bottle.For safety, do not use fresh garlic. Store (powdered) garlic flavor in the refrigerator.