Custom Thermoses & Vacuum, Rover Copper Vacuum Insulated Camp Mug 14oz - Double Wall & 24Hr Cold, The Rover Copper Vacuum Insulated Camp Mug 14oz brings a cozy campfire ambience to any setting. It features durable, double-wall stainless steel construction with copper vacuum insulation to keep your favorite beverages hot for 6 hours or cold for 24 hours, no matter what weather you encounter. Plus, this camp mug's thoughtful design prevents condensation from forming on its exterior. Rugged 18/8 grade stainless steel Copper vacuum insulation Condensation-free powder coating is scratch- and fade-resistant ... #1625-76 $11.95/each.