Protein bars are everywhere. Once a niche item at health food shops and sports supplement stores, they've muscled their way into mainstream supermarkets and stores, and they now come in all kinds of formats and flavours.
With competition now so intense, the unusual packaging design adopted by Jacked Granny (yes, that's really the brand's name) might be seen as purely an attempt to stand out on the shelves. But it turns out that there's a practical reason why it's putting its products in sardine tins (also see our round up of packaging design inspiration).
