1 yellow cake mix
3 eggs
1 1/4 c. milk
1/3 c. oil
1 can pina colada mix
1 (8 oz.) Cool Whip

Mix cake mix, eggs, milk and oil together and beat for 2 minutes. Pour into a 9x13 inch greased pan and bake for 30 minutes at 350 degrees or until done.

While cake is still warm, not hot, punch holes into it with a knife. Pour pina colada mix all over cake and let set until it cools completely. Spread Cool Whip over cake and refrigerate.