Nope, not heating plates. These new-fangled mugs contain heating elements within the mug's structure. The mug sits on a recharging base plate. You can pre-program (some with cell phone) to heat the mug to a desired temperature. That heat will be retained for up to one hour without sitting on the base plate.
Several brands available. Here's a pic of one (chosen at random):
Several brands available. Here's a pic of one (chosen at random):