Thermos mug of ergonomic shape made of high-quality durable steel with soft-touch coating and airtight lid. The lid has a special design that allows you to use the thermos mug comfortably with just one hand. To take a sip, simply press and hold the button, and release it to automatically lock the lid. Suitable for hot and cold drinks. Capacity 400 ml. When using with hot drinks, steam may accumulate under the lid under pressure. When pressing the button for the first time to release steam, hold the thermos mug vertically and at a safe distance from your face. - Hold the button to take a sip. Release it to automatically lock the lid. - Airtight lid. - Food-grade durable 304 stainless steel. - Double walls with vacuum insulation. - Keeps drinks hot for up to 8 hours. - Soft-touch coating. - Ergonomic shape.