As important as it is to evaluate the characteristics of an item when you are thinking about buying it, one thing to always keep in mind, especially when you intend to buy a cup, plate or other item that will be in contact with food, is safety. Many materials, in fact, when they come into contact with food, release their components and this is not healthy for the user.
With this automatic self-stirring cup, however, you don't have to worry about the safety of what you're drinking. That's because the cup has food-grade construction; which means it's made from quality materials that won't leach. So your drinks will remain free from contamination.