Triple Mushrooms

Triple Mushrooms are a performance booster item found in many Mario Kart  games. They are a set of three Mushrooms, used the same way as a normal Mushroom. Triple Mushrooms are rarely acquired above fifth place, however, but are common under said position. If players get hit with something while carrying these, then they drop all except one, making it a simple Mushroom.

http://www.mariowiki.com/images/thumb/1/15/MKwii_TripleShroom.jpg/600px-MKwii_TripleShroom.jpg