The 20 Oz Tumbler Is Double Walled And Vacuum Insulated; Therefore, The Cups Ensure That Cold Beverages Keep Cold For 12 Hours And Hot Drinks For At Least 6 Hours; So It Will Bring You Coolness In Summer And Warmth In Winter. These tumblers are great for gift giving or just a gift for yourself. Want a different color let us know and we will see if we have it in stock. Want another saying? No problem!! Just let us know what you have in mind. If you want to make it personal look at the personalized tumbler listing