304 Stainless Steel Coffee Mugs Portable Cups Heat Insulation Anti-fall Thermos Mug Home with Cover and Handle 400ml Mug. Desktop lightweight mug. Heat insulation anti scalding, hot and cold dual use, easy cleaning. The mug is made of durable stainless steel and has a double-layer vacuum insulation layer, which can well protect your hot or cold drinks. The coffee cup is equipped with a sealed lid with a rubber gasket to ensure a tight fit. The wide, comfortable grip and non-slip handle will help hold your coffee cup and make it easy to drink.