Guardian:

Name: Blue latte.

Age: Less than a week old.

Appearance: Blue.

What on earth goes into a latte to make it blue? Ginger, lemon, coconut milk, agave and blue algae powder.

That sounds a bit experimental. It’s very popular. The blue latte was only introduced at Melbourne’s vegan Matcha Mylkbar last Saturday, and they’ve already sold more than 100 of them, at A$8 (£4.60) each.

Nearly a fiver for a coffee? Well, no, not exactly. Coffeeis not among the listed ingredients of the blue latte.

What? How can you charge nearly a fiver for a latte with no actual coffee in it? It’s down to the blue algae, which costs as much as $3 a gram and is said to have powerful antioxidant properties. Customers can’t get enough of it.

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