Customized Tumblers & Travel Mugs, 28 oz Summit - Powder - Matte White - Vacuum Insulated, 28 oz double wall 18/8 stainless steel thermal tumbler with copper vacuum insulation, clear Eastman Tritan push-on lid with thumb tabs, and powder coated finish · patent pending - gift box included. The imprint will take on the texture of the powder coat surface. Hand wash recommended. Do not microwave. ... #833571 $25.77/each.