These accessories are designed for use with microwave ovens. People today are more discerning when it comes to coffee, and they are becoming increasingly interested in roasting their own beans. However, roasting takes a lot of effort and requires the purchase of an expensive and dedicated machine, therefore ordinary people don't feel motivated to do it themselves. By taking advantage of microwave ovens found in kitchens across the world, roasting coffee beans can become cheaper and easier for everyone.