While ceramic is good for thick standard mugs, it is a very inefficient material for actively heated smart mugs.
The heating cycles cause materials to expand and contract repeatedly which will lead to cracking, chipping and flaking. The adulterants will eventually get into your beverages and you.
Food grade stainless steel is a fantastic drink ware vessel. It doesn't corrode, is hygienic and incredibly easy to clean. Stainless steel conducts heat very efficiently which usually means a rapid loss of temperature. However, we used some ingenious engineering to utilize that trait to our advantage.
The MugTop is insulated with a double walled construction that transfers heat into your beverage and not your hands.