Will not corrode.
The general insulation cup is 304 stainless steel, corrosion resistance is relatively weak, so loaded with coffee, milk, such as acidic and alkaline drinks easy to corrode. But if it is like the U.S. cool water mirror liner ultralight insulation cup that kind of 316 stainless steel material will not have to worry about.
316 stainless steel insulation cup itself is safe and hygienic, mainly in daily use to pay attention to some things are not suitable for soaking insulation cup. 304 stainless steel is suitable for food-grade, 316 than 304 higher level. 316 is mainly used for medical equipment, of course, can also be used in the tableware of one or two types of tableware, but the cost is a little higher.
316 stainless steel insulation cup is harmless. 316 stainless steel is a kind of austenitic stainless steel, due to the addition of Mo element, so that its corrosion resistance, and high-temperature strength has a greater improvement in high temperature resistance can reach 1200-1300 degrees, so with 316 stainless steel made of insulation cup is harmless.
We usually use the most material of the insulation cup is 304 stainless steel and 316 stainless steel. Stainless steel is the most common type of steel, high temperature resistance of eight hundred degrees Celsius, with excellent stainless steel corrosion resistance and good resistance to intergranular corrosion performance.
Good processing properties, high toughness, with a weak magnetism. 316 stainless steel due to the addition of molybdenum, so that its corrosion resistance, high temperature resistance are better, high temperature resistance can reach 1200-1300 degrees, can be used in harsh conditions, itself non-magnetic.