All our glasses are crafted from lead-free crystal. The glass is processed in such a way that they are balanced, light and durable. Multiple heating and cooling cycles coupled with tempering the mouth will give you the highest quality of glass. It requires 5 artisans to create a mouth-blown glass. Each of the production steps requires years of apprenticeship before being deemed experienced enough to create these glasses. Their ability to recreate a unique product with exceptionally similar tolerances and consistency is remarkable. Our quality checks are meticulous and only the very best stems will make it into the customer's hands. All glasses that do not pass the inspections are 100% recyclable without a loss in purity and quality.