DOUBLE BRUSH: The cup brush with double sided bristle brush, 360 degree no dead angle cleaning, makes cleaning your glassware a breeze. Just make sure you rotate cups clockwise on center brush as going counter clockwise will unscrew the center brush. QUALITY & DURABLE BRISTLES: Glass cleaning brush is made of PP+PVC material, flexible bristles, moderate hardness to ensure remove stubborn dirt and longer life. SUCKERS: There are three big suction cups at the brush bottom. Suction grip base firmly attaches to the wall table or or attaches to the bottom of sink, just slide glassware between the two sets of bristles, convenient to use and cleaning. REMOVABLE & EASY TO CLEAN: Creative rotating cup brush can be removed and cleaned, easy to drain, clean and hygienic.