351ml Capacity: The portable cup has a 351ml capacity, offering a convenient size for a generous amount of liquid. Two drinking options: open the top cover or drink directly without removing the lid. Material: The travel coffee tumbler features a stainless steel seamless liner, providing durability and leak-proof performance at any angle. Keeps Hot and Cold for 6 Hours: The insulated tumbler is suitable for hot or cold beverages such as coffee, tea, water, milk, soup, cola, and latte. Application: Ideal for use at the gym, pool, office, or home. Its modern design makes it a practical and stylish choice for everyday use. Specification: Material: Stainless Steel, Ceramic Capacity: 351ml Size: 7.65cm x 7.65cm x 14cm / 3.01inch x 3.01inch x 5.51inch Package Includes: 1 Coffee Tumbler Cup Note: When pouring boiling water, steam pressure may build up. Do not press the button to open the lid immediately; instead, rotate and unscrew the lid slightly to release pressure before opening. Always secure the lock when not in use to prevent accidental spills or burns.