The Scottish Professional Football League Challenge Cup, commonly known as the Scottish League Challenge Cup or Scottish Challenge Cup, is an association football knock-out cup competition. It is contested by 32 clubs, which in the 2015–16 season includes the 30 members of the Scottish Championship, Scottish League One and Scottish League Two. The other two first round places are filled by the Highland League champions and the Lowland League champions. The competition is run by the Scottish Professional Football League, and is named the Petrofac Training Cup after sponsor Petrofac.