Which beverage is decaffeinated according to its type code?

The beverage identified as Cold Brew Frappe Decaf is correctly classified as decaffeinated based on its type code. The inclusion of "Decaf" in the name explicitly signifies that this beverage has gone through a decaffeination process. This ensures that customers seeking to reduce their caffeine intake can safely choose this option without misunderstanding.

In contrast, the other beverages listed, such as the standard Frappe and Cold Brew Frappe, do not indicate any decaffeination and therefore contain regular levels of caffeine. The Chair Frappe is also not recognized as a typical type and is unlikely to be established as a decaffeinated option, further confirming that Cold Brew Frappe Decaf is the sole beverage in the question that meets the decaffeinated criteria.