Which cocktail is not shaken or strained?

The Oatmeal Cookie cocktail is typically served as a layered drink or blended without the need for shaking or straining. This style of preparation allows the ingredients to maintain their distinct flavors and textures, giving the cocktail its unique character.

In contrast, other cocktails like the Perfect Manhattan, Orgasm, and Pina Colada generally require either shaking or straining to achieve the desired consistency, mix the flavors thoroughly, or chill the drink properly. By not being shaken or strained, the Oatmeal Cookie remains true to its intended presentation and taste, showcasing the individual components in a way that enhances the overall drinking experience.