The 'embarrassing complaint' video that's in fact a prank

This went on Facebook as an embarrassing customer complaint. In fact it was a prank call.

Lant

What is Lant?

It was used, among other things:

To freshen the breath,
To flavour ales,
To glaze hard pastries.

But what is it?

To find out look here but you may want to be seated when you do so, because if it was used for these things today the health and safety and food police would have a field-day! But it makes you think, doesn't it?