To make an ice ring: Arrange sliced fruit(I use limes) in bottom of a
ring mold, and add just enough water to cover fruit but not float it;
freeze until firm. Add another layer of fruit. It is easy to stick the
slices on the sides because the mold will be frozen. Add more water and
freeze. Repeat with another layer of fruit and water if needed to fill to
the top of the mold. Freeze.
Unmold ice ring in punch bowl. Pour thawed concentrates and water into
bowl. Gently pour in ginger ale and champagne and serve.