Why this tumbler earns its place
The Endeavor old-fashioned is the workhorse tumbler for any operation serving spirits neat or on the rocks. At 260ml (9¼oz), it's the right volume for a proper measure of whisky or gin with ice, or a spirit-forward cocktail served up. The 98 mm height and 89 mm diameter give it a solid, professional feel in the hand—balanced weight without the bulk of lead crystal.
Every glass is strengthened with Onis Xtratuff treatment, which hardens the soda-lime glass against thermal shock and impact. That's where Xtratuff earns its name: in a busy bar or restaurant, glasses move fast between tables, dishwasher, and shelf. Untempered glass chips and cracks; Xtratuff glass endures. The economics stack up quickly—lower replacement rates, fewer service gaps because you've run out of clean stock, and visible durability that suggests a venue that takes its service seriously.
Stackable design means you can store them efficiently without hogging cupboard space. Dishwasher safe for unlimited cycles. The clean, unfussy design works in any setting.
