Muurla Moomin 1716-037-01 Originals Missing You Enamel Mug Cup 12.5fl oz

Loved this the minute I took it out of the box however the first time I used it these strange pink circles appeared on the front and back. Washed it with mild dish soap ...didn't make a difference. Have no idea what caused this. Was only used for warm coffee and the inside of the mug is fine.

Toller Becher, perfekt für meinen Kaffee.