We read recently - Things you can do with coffee that doesn't involve drinking it - Do note this is with the coffee grinds from real coffee, not instant coffee. 1. Fertilize your plants Soak two cups full of coffee grounds in a bucket of water and shower your plants once a week. This seems to work. 2. Make your hair shinier Brew a cup of coffee, wait for it to cool (obviously), apply to your hair for 20 minutes and then rinse. mm mm havent tried this one await review.