Igloo born from a modest metalworking shop back in 1947, Igloo has been instrumental in redefining how we live, work and play. What began with bringing clean water to the worksite quickly has got back to it's roots by engineering the perfect pour. Legacy Tumblers contain the heritage flutes which is an iconic Igloo design that also provides a comfortable grip.Durable vacuum insulated stainless steel body keeps drinks hotter/colder longerPress-fit Tritan lid protects from unwanted splashing and provides smooth lip for pleasant drinking experienceStackable all sizes are designed to stack so they can be stored easilyRounded lip provides comfortable spot for sipping without the lidOunce markings for easy measure 1.5oz for spirits or 5oz for the perfect wine pour