good quality. clean weldings, except that the left and right handles are not symmetrical. one has a bigger gap between the mug and the handle than the other. but it doesn't make any problem in using it or something. I like it very very much . the "350" number on the glass jar, means 350 Grams (not milliliters). I filled the glass jar with water to the top, and spilled it into the mug. (pictures included).