The Tervis Onyx Shadow 30oz stainless tumbler is a 30oz Traveler triple-walled stainless steel insulated tumbler in Onyx Shadow black powder coat — larger format, full mug capacity. The triple-wall vacuum-insulated stainless construction holds cold drinks cold for 8+ hours and hot drinks hot for 4+ hours, and the Tervis Made-for-Life Guarantee covers the tumbler against manufacturer defects.
Right tumbler for daily commute mugs, gym water bottles, lunch-pail rotation, and gift-giving where the recipient cares about both insulation performance and an American-made identity. The Onyx Shadow exterior makes this Tervis distinct from generic black-tumbler imports.
Tervis Tumbler Company has been making double-wall insulated drinkware in North Venice, Florida since 1946. The classic clear-tabletop tumblers and the modern triple-walled stainless Traveler line are both made stateside, and Tervis is the default reference brand for American-made personalized tumblers and travel cups.
