Use a 9 x 13 inch glass pan.

6 (3 oz.) pkgs. Jello (6 different flavors)
2 pts. sour cream

Take first package Jello and mix with one cup boiling water. Put 1/2 cup of mixture in each of two bowls. To the first bowl, add 5 tablespoons cold water, pour in pan, and let set in refrigerator for 30 minutes (until firm).