Stay hydrated in style with this Duke Blue Devils 30oz. Swag Tumbler With Straw Lid from Tervis Tumbler. This tumbler boasts a copper-lined, stainless steel construction with triple insulation, ensuring your beverages stay hot for up to 8 hours or cold for up to 24. The vibrant, all-over Duke Blue Devils graphics let everyone know which team you're cheering for, making it the perfect gameday companion.