I see this is a slow day for /kc/ as well. In the meantime the traffic picks up it's usual bustling I give Bernd an update. I bought/gathered everything necessary for the project. - The foil is about 1,5-2 €. - I chose to buy a spray paint as it was just 3€. - 5L plastic barrel, 10€ - 5L steel beer keg, I think it's starts from 15€ (full with beer, if you want a similar water heating system than you have to sacrifice yourself and drink the beer firs) - cardboard (not depicted, I leave it to Bernd's imagination), cost: free? larger types come with larger household appliances, fridges, owens, washing machines..., probably could be obtained from family, friends, acquaintances, maybe from certain businesses who would just discard some, or maybe from your own workplace? hm? So the cost of this shit, all in all is 30$ (less than 10 000 HUF). It could be cheaper as the keg is usable in this form, but it has weaker water flow than the plastic barrel, which still kinda weak. But I (my family) already had that barrel so, why not.