In this paper, the Römer-glass are assessed as indicator of the technology and design by using a comparative method. We identifed their designing technology methods and associated them with manufacturing centres. All of them made from green forest glass and produced in northwestern and central Europe from around 1000-1700 AD. The Römer glass present dining traditions and habits in the middle ages, furthermore like a personal belongings can be associated with the presentation of social status or individual expression.