If it’s a four-fingered wafer covered in chocolate, the Kit Kat people would tell you they own that design.
Spare a thought, then, for identical treats like Norway’s Kvikk Lunsj – pronounced “quick lunch” – which has been around for 80 years.
Nestlé has tried to trademark the chocolate bar’s three-dimensional shape for more than a decade, which rival Cadbury has fought hard against.
The European Court of Justice is due to hand down judgement on Wednesday, which could end Kit Kat’s protected European status and a saga that has proved expensive for both sides.
It could also open the door to own-brand imitations at your local supermarket.