Entertaining the Costco Way

This gem found its way into our house last night through a white elephant gift exchange. My wife "stole" it since she knows how much I love Costco.

Honestly, I have no idea what's inside but it may contain the secret of how many servings are in a Costco sheet cake. According to close friends Jason and Erin, there are three servings. One for Jason, one for Erin and the last one for breakfast the next day.