【High Heat Retention & Cold Insulation】 This double-walled vacuum tumbler can maintain temperatures above 51 degrees Celsius for 1 hour, and keep cold drinks below 7 degrees Celsius. It's suitable for various beverages, making it ideal for outdoor activities and everyday use. 【Lip-Fit Shape】 The lip-fit shape is gentle on the mouth, designed for easy drinking. The thickness and curves are exquisite, providing a comfortable fit. 【Stylish Design】 Featuring a simple and stylish design that matches any scene. Perfect for use in the kitchen or outdoors. - Brand: Grinday - Product Name: Double-Walled Vacuum Tumbler - Capacity: 450ml - Shape: Lip-Fit Shape - Heat Source Compatibility: HOT/ICE compatible - Material: Stainless Steel - Heat Retention: 51 degrees Celsius or higher (1 hour) - Cold Insulation: 7 degrees Celsius or lower (1 hour) Thank you for viewing.