Claimant manufactured Jif lemons.
Defendant wished to produce lemon juice holders almost identical to those of Jif.
Claimant argued that Defendant was passing off. Defendant argued that use of a lemon to hold lemon juice was both common to the trade, and descriptive.
On facts:
Use of plastic lemon not ‘descriptive’
Even if the plastic lemon was descriptive, had acquired a secondary meaning
However in any case probably only words can be descriptive
Use of plastic lemons not ‘common to the trade’
Plastic lemons were not in general use in UK; Jif was the sole provider
Thus Defendant was passing off, and could only market plastic lemons if they had sufficient distinguishing features from Jif.