There have been many non-dairy milk alternatives - oat, soy, coconut, cashew, hemp, banana, …
Now we have yet another option:
Smash hit: is potato milk the ultimate vegan option?
It’s white, milky, better for the planet – and even works in a cappuccino
Do bear in mind that the Guardian's Pass Notes section is intended to be well-laced with humour. Nevertheless, it is a real thing and there is an outside possibility someone might choose to try it.