German drinks manufacturer Nutrichem, owners of Inkospor (Inko), has unveiled its first low-fat ready-to-drink protein shake, which is also the first of its product range to come in a plastic bottle.

The company has, until now, only had the capacity to produce glass bottles.

The new drink, X-treme Protein, is marketed as a 'six-pack' - not only does it come in a pack of six 500ml bottles, but the plastic bottle itself is moulded to look like a man’s six-pack.

The drink’s original formula provided a high protein drink with high fat and calories for muscle-builders with high calorie turnover, whereas this new drink – reformulated to be low-fat and low-carb – is for people who want protein without the calories. It contains 50g protein, 35g carbohydrate and around 2.5g fat.

It comes in three flavours: chocolate, vanilla and strawberry.