Made of high quality stainless steel and food grade plastic, it is safe and durable. This automatic magnetic mug is specially designed to automatically stir tea, coffee, etc. No more spoons, quick stir bowl for both home and office use. Just press the button on the handle and it will mix by itself immediately. Silent mixing wheel and leakproof mug lid, no need to worry about liquid splashing. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.