Although at first glance it almost looks like a contraceptive device, rest assured the only thing the Method Aroma Ring prevents is a smelly house. Method has always had a good eye for design when it comes to home products, and the Aroma Ring is no exception. The look is simple and understated. So simple in fact, that it doesn't have to plug in or anything. You just sit it out where you want it and walk away. All the mess is protected behind a one way barrier, so the only thing that is getting out is a refreshing smell. Available in cut grass, lavender lemongrass, sweet water, and vanilla apple. Price is $8 per ring, or $5 for a refill.