To make coffee oil, choose your preferred method (cold infusion, hot infusion, or maceration). Measure the coffee beans and carrier oil according to the recipe. Grind the beans and combine them with the oil. For cold infusion, let it steep for 24-48 hours; for hot infusion, heat the oil and coffee together for 1-2 hours; for maceration, heat the mixture in a slow cooker for several hours. Strain the infused oil through cheesecloth or a sieve into a glass jar. The resulting coffee oil can be used for skin moisturizing, anti-aging, and antioxidant benefits, or for hair strengthening, conditioning, and growth promotion.