We discovered these at TDIFest 2012 and were blown away. This funnel is designed specifically for the oil fill on the TDI valve cover. With two "locking" tabs, this funnel turns in and locks in place exactly like the oil cap. Plus it uses the same OEM o-ring as the oil cap, ensuring no spillage.
Beautifully made, anodized aluminum bottom.
Due to clearance issues, this funnel does not work on ALH New Beetle models.