Custom Tumblers & Travel Mugs, Basecamp Sequoia Coffee Mug - 12 oz - Vacuum Insulated & Leak Proof, 12 oz Vacuum insulated double wall coffee mug with a flip up lid. Powder coated 18/8 stainless steel with copper lining; screw on, leak proof open lock lid. Keeps contents cold for 24 hours or hot for 12 hours. Not microwave safe; hand wash only; BPA free. Packaged in a retail box.​ ... #BC9810 $13.87/each.