Ginger beer, vodka and lime - oh my! Swig is now offering the worlds's first triple insulated Moscow mule mug in a hammered finish The copper-effect finish is handwash only. Keeps drinks cold up to 9 hours and hot up to 3 hours. Holds up to 14oz. Slip-free, scratch-free and noise-free silicone base. Includes BPA-free lid with removable slider for cleaning. Triple insulation technology: double-walled, vacuum-sealed and copper-plated.