The Donut Warming Mug

This mug has a shelf on it (see the pic of the mug minus donut) to set a donut on, to warm the donut up. Of course, by setting a donut atop a steaming vessel full of liquid, you now have a wet donut. The manufacturer also touts the ceramic shelf as a way to keep your moustache clean when you drink coffee, which might work, if you hadn’t just melted a bunch of sugar onto it.