Shinkoukinzoku 4 Sizes Pure Thermal Beer Mugs, Available, Silver, 460ml, Lightweight, Copper, Conductivity, Outdoor, Retro, Mug, S-586SNL

【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction. 【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary. 【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product. 【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. Copper is one of the metals with excellent thermal conductivity. If you pour a cold drink into it, it will immediately become as cold as the drink, quenching your thirst and cooling your body. The refreshing feeling that you feel on your lips is irresistible. The cooling effect also lasts, so you can enjoy the drink cold and delicious even after 15 minutes. The water droplets that form on the surface accentuate the refreshing feeling.