Long before this the immunity temporarily conferred by the original package doctrine upon liquors had been extended to cigarettes[933] and, with an instructive exception, to oleomargarine. The exception referred to was made in Plumley _v._ Massachusetts,[934] where the Court held that a statute of that State forbidding the sale of oleomargarine colored to look like butter could validly be applied to oleomargarine brought from another State and still in the original package. The justification of the statute to the Court's mind was that it sought "to suppress false pretenses and promote fair dealing in the sale of an article of food." Nor did Leisy and Co. _v._ Hardin[935] apply, said Justice Harlan for the Court, because the beer in that case was "genuine beer, and not a liquid or drink colored artificially so as to cause it to look like beer." That decision was never intended, he continued, to hold that "a State is powerless to prevent the sale of articles manufactured in or brought from another State, and subjects of traffic and commerce, if their sale may cheat the people into purchasing something they do not intend to buy * * *."[936] Obviously, the argument was conclusive only on the assumption that a State has a better right to prevent frauds than it has to prevent drunkenness and like evils; and doubtless that is the way the Court felt about the matter at that date. On the one hand, the liquor traffic was a very ancient, if not an altogether, venerable institution, while oleomargarine was then a relatively novel article of commerce whose wholesomeness was suspect. On the other hand, laws designed to secure fair dealing and condemnatory of fraud followed closely the track of the common law, while anti-liquor laws most decidedly did not. The real differentiation of the two cases had to be sought in historical grounds. Yet the State must not put unreasonable burdens upon interstate commerce even in oleomargarine. Thus a Pennsylvania statute forbidding the sale of this product even in the unadulterated condition was pronounced invalid so far as it operated to prevent the introduction of such oleomargarine from another State and its sale in the original package;[937] as was also a New Hampshire statute which required that all oleomargarine marketed in the State be colored pink.[938] A little later in the case above mentioned involving cigarettes, the Court discovered some of the difficulties of the original package doctrine when applied to interstate commerce, in which the package is not so apt to be standardized as it is in foreign commerce.[939] DEMISE OF THE ORIGINAL PACKAGE DOCTRINE