Stay hydrated on the go with the Thermos 420mL Vacuum Insulated Tumbler Black Gradation JDE-421Ltd Bk-G Japan. This durable stainless steel tumbler keeps your drinks hot or cold for hours, thanks to its vacuum insulation system. Its unique inner wall gradation adds a touch of personal style, while the tight-seal lid and non-slip base ensure a secure grip. With its sleek design and superior insulation, this tumbler is a must-have for any hydration enthusiast.