Description: This 300ml thermo mug is made of high-quality 304 stainless steel, which is non-toxic and odorless. It is ideal for home and office use. The sealable lid prevents liquid from spilling and can extend the heat retention time. Key Features: -Double-wall construction:The two layers of material, often stainless steel, create a space that is then vacuum-sealed. -Vacuum insulation:The vacuum eliminates air, which is a conductor of heat, preventing heat from escaping or entering the tumbler or mug. -Temperature Retention:This insulation keeps drinks hot or cold for hours, much longer than traditional drinkware. Keeps liquids hot (6-12+ hours) or cold (12-24+ hours). -Durability and portability: Vacuum insulated tumblers and mugs are often made of durable materials like stainless steel and designed to be compact and portable for use on the go. -Sweat-Proof Design:Condensation-free exterior, making them ideal for both hot and cold drinks. -Spill-Resistant:Many models come with leak-proof lids and ergonomic handles. -Stylish & Customizable:Available in various colors, finishes (matte, glossy, copper-plated,decal,water transfer...), and sizes. Product Parameters: Capacity:300ml Size(W*H): 8x14.5 cm Package: white individual box or custom Meas: 36x37x32CM Qty: 30pcs/ctn G.W.: 10.08 kgs