White Square Dinnerware Corelle Dinnerware Cups/mugs?

Corelle dinnerware cups/mugs? - white square dinnerware

I bought the place pure white Corelle Dishes Shop for Corelle pieces. I do not believe in the series, because they do not offer the parts which I, for my personal use. My question is whether the chip as simple porcelain cups, stoneware? I read comments, said in the consumption of stone and the most that the bad chip. Any help would be appreciated. Thanks