Going West with a Cup of Coffee

I purchased this reinforced polystyrene cup complete with contents on a train in Japan, and was most alarmed to read the description:

I'm going WEST with a cup of coffee.

The beverage was admittedly a little bitter (tip: don't go to Japan for the coffee), but I survived to be able to write these lines.

(For the uninitiated: the "WEST" reference is due to the fact that the coffee was provided by the train company "JR West Japan").