This is a neckline that extends upwards beyond the neck. The garment is worn by pulling it over the head. This style is generally seen in warm cloths such as coat, jacket, sweater, jumper, jerseys, fleece etc.
A proper Funnel neck style by its name as funnel shape (the extension widens as it extends from the base of the neck just like a funnel) is the extension of the actual garment and is not sewn as separate extension of the neckline.
A Turtleneck (polo neck) has a close-fitting collar that folds over and covers the neck.