NOW Essential Oils, Peppermint Oil, Invigorating Aromatherapy Scent, Steam Distilled, 100% Pure, Vegan, Child Resistant Cap, 2-Ounce

This is the best bang for your buck. I needed a large amount because I use peppermint oil for a lot of things but the main thing I use it for is as a rodent deterrent. I mix 10 drops in a spray bottle with water and spray my porch and under the hood of my Toyota (Toyota uses a lot based wiring insulation and the rodents are attracted to it). I also spray the currently used bath towels with this solution to keep the old towel smell at Bay. It works great as a fabric refresher and air freshener. This "now" brand peppermint oil says that it is not diluted and I believe it because it is strong. I will continue to buy this product as long as the price stays the same.

My husband mixes this with water in a spray bottle. It keeps mice out of his car engine (where they have made a nest before). We have not seen mice or chewed up wiring since. I like put some on a cotton ball and keep it in my closet. It's supposed to keep spiders away as well.