by NUDE Design Team The NUDE Stem Zero collection is the world’s toughest, yet finest, lead-free crystal range – made using our ‘Ion Shielding’ Technology. An addition to the family, this Volcano tumbler boasts the same generous bowl, tapered sides and crystal cut rim we’ve come to expect from the edit. Exquisitely simple and versatile, it can be used for serving water, fruit juice or wine, depending on the occasion.