The Stalagmit lamp stands at the forefront of sustainable glass product design, embodying a profound shift in the way we perceive and utilize glass. At its core lies a fundamental principle: reusability. By repurposing discarded glass – a byproduct typically overlooked in conventional glass production – the Stalagmit Lamp foreshadows a micro revolution within the small scale industry. The lamp is made of wasted float glass that manufacturers throw away. The discarded material is collected, smashed into fine powder, and carefully layered in a stalagmitic shape. The layering process consists of three parts; firstly, positioning of discarded cardboard rolls that serve as a frame for glass powder. Secondly, alternatingly applying glass powder and sand to create a stalagmitic shape, and thirdly, positioning the outer metal mold which holds and prevents the mixture of sand and glass stand on their place when being fired. After the firing in a glass kiln, glass powder turns into a solid structure that can stand on its own. The outer metal mold and sand are removed and reused for the production of the next lamp. In that way, not only glass, but also sand and metal molds support the idea of reusability.