High quality ABS and redesigned upper cup holder for improved stability and sturdiness.The cup holder shaft can be rotated 360, turning one cup slot into two, which can store two beverages at the same time, increasing space utilization for you.Insert the base into the car cup slot,Rotate the cup holder expander to expand the bottom adapter and firmly fixed the base,This 2-in-1 car cup holder extender will fit most models and may not be compatible with some cup holder styles with pointed or elongated shapes.