no, this is not a mirage....

People! What you see before you is a BOX O CIDER.....

Knowing that we were headed to a place where campfires are not allowed we decided we'd need heated up by other methods.

And this box o cider just about did it.

The answers to your questions are:

1) yes it is readily available and can be purchased from Sainsbury's
2) no it wasn't expensive - it was £7 for the whole box
3) actually, it tasted bloody good. In fact, a bit too good (hence the slightly wobbly photo of it)