Most authentic mugs are acquired through a "Pfand" (deposit) system at European Christmas markets:
: Specializes in authentic German holiday decor, including traditional 0.2L ceramic mugs. Purchasing at Christmas Markets buy gluhwein mugs
If you cannot visit a German Christmas Market (Weihnachtsmarkt) in person, several online platforms offer authentic and replica mugs: Most authentic mugs are acquired through a "Pfand"