Here's an original 1950s adverting bar of soap shaped like a Sinclair Heating Oils truck in its original box and wrapping. 

SINCLAIR HEATING OILS bold emb on both sides of truck.....green soap.....4 1/4"long.....Excellent like new condition with no damage. You could still probably use the soap it is so nice!  It comes in its original wrapping and box, which has a picture of a boy playing with the soap truck in a bathtub. Box is in good condition.