Both magical and magnetic, the neatly designed MAG Tumbler boasts an infuser ball that brews tea like no other. The spherical infuser holding the leaf tea of your choice starts brewing in the tumbler as soon as you top it with boiling water. When your drink is brewed to perfection, simply turn the tumbler upside down, and you?ll see the infuser cling to the lid in no time, thereby avoiding excessive steeping.