Shiny Porygon2 Japanese Advertisement Mug

I bought this last year & it’s a cute pen cup for my desk. After washing it a few times the glaze began to flake off especially around the rim & easily scrapes off with my fingernail. I don’t want to continue to wash it as the graphic will come off with the glaze & I don’t want to ingest the glaze. Now it’s just for decoration.

Needs a little bit of DPi but, it's beautiful and came perfectly fine from it's long journey to my country.