DIY–<a href="https://en.wikipedia.org/wiki/Haybox" class="extiw" title="en:Haybox"><i>Haybox</i></a> or <i>insulation cooker</i>, insulation made from Extruded polystyrene (XPS), Germany
<a href="//commons.wikimedia.org/wiki/User:DKrieger" title="User:DKrieger">DKrieger</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>