COFFEE MUG WITH VACUUM INSULATION: This particular coffee mug features vacuum insulation for added thermal protection. The design of the insulation, which consists of two walls, guarantees that beverages will maintain their temperature for the duration of their time in the container. Your hands will be protected while you are able to enjoy either hot or cold beverages. COFFEE MUG WITH BPA-FREE SLIDING LID: The BPA-free plastic sliding lid with a rubber gasket, which is safe and eco-friendly, and provides a good level of tightness. The opening can be accomplished with a simple swipe, minimizing the risk of water getting inside. When the mug is not being used, the sliding lid should be closed to keep it clean. There is a drinking hole on the top of it, and straws can be used with it. STAINLESS STEEL COFFEE MUG The coffee mug is made of food-grade 18/8 stainless steel, the liner of the coffee mug will not produce any taste and will not rust, and it is easy to clean. The body of the coffee mug has a sturdy structure, which means it can be used for an extended period of time without breaking down. ANTI-SWEAT DESIGN MAKES THE COFFEE MUG EASY TO GRIP AND GENTLY FITS INTO YOUR HAND 400ML COFFEE MUG: The 400ML mug is lightweight and easy to carry, the surface of it is matte powder coating, and the anti-sweat design makes the coffee mug easy to grip. The grip is non-slip and the handle is long and wide, making it easy to get a hold of with your fingers.