Crafted from highly borosilicate glass The mug body is clear and visible that is easy to observe mixings and better control time This electric stirring mug is battery poweres that requires 2pcs AAAbatteries ( not included), which is and portable to use Three-pronged stirring stick, makings more efficient and even stirring The tastes is more silkier and smooth Easy to use This electric stirring mug features strong power that have 7000rpm highly speed stirring Without lumps and taste delicate and smooth It perfect for mixings beverages Such as coffee, hot chocolates, milk, protein shakes, milk