BOSCH  Stainless Steel Bowl 
Bosch has introduced a lock- on stainless bowl that will fit the whips and dough hook from the white bowl that you already own.   It also includes splash ring and center cover as shown.  This one is designed for the Universal Plus Mixers only so it will lock onto the machine.  Stainless bowls are ideal for making things that need to be cold like whipping cream and pastry.