In 1870s the Iser Mountains became known all over the world for the production of perfume bottles, cruets for salt, pepper, oil and other spices. Wilhelm Riedel invented and patented the technology of “using compressed air to shape hollow glass in metal moulds”. This outstanding innovation was responsible for the rapid exceeding success of the company. The decorative element was applied through machine-blowing that imitated cutting elements. The company where this new technology (patented on 23 September 1879) was executed was the foundry in Untermaxdorf.