Setup. A 4 metre square of cones for each pair. One keeper inside, one outside with a ball.
How it runs. The keeper starts in the middle. The partner calls a corner: one, two, three or four. The keeper gets there with the right footwork (side steps to the side, forward on the toes, backwards with small quick steps), touches the cone and returns to the middle. After every third call the partner throws the ball for a catch. 30 seconds on, 30 off, three rounds each.
Make it harder. The partner points instead of calling. Then the partner calls a colour for each cone.
With 4 keepers. Two pairs, two squares.