That's a shameI don't remember ever having a mug but my brother and I each had a heavy baby/cereal bowl with the bunnykins on them When were grew too big for them they became the dog's and cat's bowls. I believe there were other plates that were the same thickness as normal 'adult' plates, and just as fragile. They didn't survive.
Mine got stuck into the cabinet full of fancy crap no one is allowed to touch or use for about 23 years until I went and dug it out a few days ago. I think it's good that it'll finally be put to some good use!