The body is aluminium coated bubble wrap, the base and lid are high density foam with a covering of shiny bubble wrap and the whole thing has an external duct tape wrap ... all lovingly held together with evo stick


To test it, I boiled up 600ml of water and then stood the pot in the cosy, left it outside and wondered off to do something else. When I returned 40 minutes later the water was still hot enough to make a brew with ... result.

The weight of the thing is a massive 38g, obviously you could get that lower if you weren't so generous with the duct tape.