1. A cup holder, comprising:a fixed support;
a first arm connected by a first pivot to said support, said first arm including a first end and a second end and said first pivot is between said first end and said second end;
a second arm connected by a second pivot to said support, said second arm including a third end and a fourth end and said second pivot is between said third end and said fourth end;
a first link connected by a third pivot to said first arm and by a fourth pivot to said second arm;
a second link parallel to said first link, said second link being connected by a fifth pivot to said first arm and a sixth pivot to said second arm; and
a cup support depending from said second arm, said cup support including (a) a first slide element displaceable along a first section of said second arm so as to extend beyond said fourth pivot and (b) a second slide element displaceable along a second section of said second arm so as to extend beyond said sixth pivot;
wherein said third pivot is adjacent said first end, said fourth pivot is adjacent said third end, said fifth pivot is adjacent said second end, said sixth pivot is adjacent said fourth end, said first arm is curved, said second arm is curved, said first section includes a first guide track, said first slide element includes a first guide track follower, said second section includes a second guide track, said second slide element includes a second guide track follower, said first arm includes a third section and a fourth section, and said first arm includes a first extension element displaceable along said third section and a second extension element displaceable along said fourth section.