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Roor was founded by Martin Birzle in Frankenthal, Germany. The popularity eventually expanded to various other countries, and eventually ROOR established glassblowing factories worldwide. The name ROOR was inspired by the word micRO-ORganism, which was in a science publication Birzle was reading. ROOR pieces are also known for the signatures put on them by each blower, usually in the form of squiggly lines and dots.