The Chef & Sommelier Open Up Tumbler collection offers revolutionary design, perfect for young wines and New World wines. The slim, elegant leg of the stemmed glasses allows for optimal grip. These glasses are designed to enhance tasting with a convex bottom for perfect wine oxygenation and a large aromatic chamber that releases the aromatic bouquet. The tight neck concentrates aromas, and the flat bowl prevents water retention and white marks after washing. The tumblers, with their iconic convex and concave shapes, benefit from an extra-fine drink. Made from Krysta, a proprietary lead-free crystal glass, they offer superior rim and stem strength, complete transparency, long-lasting brilliance, and perfect acoustics. Krysta is 30% stronger at the rim than standard crystal glass and maintains its brilliance and transparency even after 2,000 professional dishwasher cycles. This set includes tumblers with a 380ml capacity, ideal for water, juices, and sodas.