Water in. Steam out. Nothing to plug in.

Twenty-seven seconds, filmed on one of our own trays, with nothing cut out. Two heat packs go in the base, tap water goes on top, and the food comes out hot. The clip has no sound.

What happens, step by step

1. 01

   Two pads in the base

   90g flameless heat packs, under the food — never in it.

2. 02

   150ml of water

   Straight from the tap. The reaction starts on contact.

3. 03

   Steam in ten seconds

   Safe indoors, in a lift, in the back of a car.

4. 04

   Serving hot at fifteen

   Holds temperature through the service, then goes in the bin.