I bought both the 200 ROUNDED (this one) and the 200 Cylinder. The glass on the 200 Rounded is very very thin in places. The glass on the 200 Cylinder version is consistent and thicker. Both are very clear and high quality, however the Rounded version was about 1/4 the weight due to the thin glass. My Rounded version cracked when I placed it on a (wooden!) table for cleaning, that is how thin it is. I suspect a manufacturing issue, but cannot find any manufacturer support site. I am VERY happy with the cylinder version.