Perfect for and This Stainless Steel Tumbler Set X Features Lids and Vacuum Insulation for Keeping Drinks Hot or Perfect for Couples and Weddings,

【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. PERFECT SIZE: The 350ml capacity is perfect for any drink. The generous space allows for plenty of ice cubes. The size is easy to carry and fits in an adult's hand. Practical cup: keeps ice cream from melting until the last spoonful and hot drinks hot until the last sip. HIGH QUALITY: Made from vacuum insulated food grade 18/8 (304) stainless steel. Splash-proof: The clear lid is tightly sealed with a rubber seal for visibility, and the straw-friendly opening can be covered with a slide closure to prevent spills. LIFETIME WARRANTY: We are committed to providing our customers with high quality products and thorough customer service. If you are not satisfied with your purchase in any way, please feel free to contact Onebttl customer service and we will be happy to assist you.