This is an insulated breakable mug ,that is mainly use for gift and for schools ,it keep ice very cold,and you can also use it to drink tea and water,if also use in presavation,in an open place,it been use for gift in patties wedding birthday and events.,if you put hot water in it it will be changing colors,it it Good to the health and is antibacterial.It is been use in bank and other high office.