The ornamental design for a cupholderbase for vehicle, as shown and described.
1. Cup holder base for vehicle
1.1 is a top perspective view of a cup holder base for vehicle embodying our new design;
1.2 is a front elevation view thereof;
1.3 is a rear elevation view thereof;
1.4 is a left side elevation view thereof;
1.5 is a right side elevation view thereof;
1.6 is a top plan view thereof;
1.7 is a bottom plan view thereof;
1.8 is a top perspective view thereof while in the state of being installed into an automobile cup holder; and
1.9 is a top perspective view thereof with an exemplary air cleaner holder attached.
The broken line showing of the automobile center console and air cleaner holder are provided for the purpose illustrating environmental structures and form no part of the claimed design.