The ancient Mayan kitchen was known for its unique flavors and ingredients. While they didn't have a built-in slushie machine, they had a traditional drink called 'chilate.' This beverage was made by grinding cocoa beans and mixing them with water, cornmeal, and spices. The mixture was then frothed by pouring it back and forth between two containers. The end result was a frothy and refreshing drink that had a slushie-like consistency.