Glass hydrotube
I've actually used peppermint as BAIT on rat traps, and caught rats! Sure, peppermint is going to keep them away! So is pineapple juice, lady's deodorant, and licorice! Give me a break. The number one search result for rat repellent right now is a bag of corn cob chips and other essential oils, including eucalyptus, grapefruit, sage, and lavender!