Onis Endeavor Double Old Fashioned Tumblers 350ml (12 Pack)These Endeavor double old fashioned tumblers from Onis have the shape and capacity to fit any beverage or cocktail service. Supplied in a pack of 12, the 350ml tumblers are treated with the Onis Xtratuff strengthening process, enhancing resistance to thermal and mechanical shock. Their stackable design saves space, while being dishwasher safe ensures effortless and swift cleaning post service.