Easy. I simply imagined myself in an emergency situation, then instead of running around waving my arms in the air panicking I sat down and boiled some water to make tea. I sat on the front step watching the pot (hey! Maybe that's why it took ages to boil) and relaxed in the sun.

After my tea I imagined I had been rescued and full internet access had been restored so I could report my findings to you.

Would 500ml (about 1 pint) be sufficient for a cup of tea and a hot meal (one of those dehydrated ones)?

A