Home / Desktop / Beechcraft 20 oz Copper Vacuum Tumbler Beechcraft 20 oz Copper Vacuum Tumbler $22.00 X 20 oz Beechcraft tumbler. Constructed with copper insulation, which allows your cold beverage to stay cold for 24 hours and at least 8 hours for hot beverages. It also prevents condensation on the outside of the tumbler. Flip top lid. Non-spill.