Material: The wine cups are made of 304 stainless steel, more durable than other ordinary glasses; And they are not easy to be broken Lid design: The lid is designed with a straw hole for cup on the surface, which is good for easy sipping with straws and helping reduce splash Advanced insulation technology: The double insulated technology is good for keeping your drinks warm or cold for a longer time Application: Wine glass tumblers are good for storing any beverage such as wine, beer, water and so on; They are easy to clean