The look of them is similar to the Bang pieces, but I studied the Bang pieces I could find on the internet and although the shape is similar the pieces are not quite the same. The bowls are also a slightly different shape than the Bang design for Kastrup that I found, and also different in the stem design. Close... but not the same. They also bear a resemblance to a Russel Wright design, although I have only seen the Wright in clear, and there is a bubble in the base. They are also slightly different in the bowl and the base than these are. Thanks, Craig