okeedokee let's makin formaldehyde

first I can make copper oxide and then
help me out plz
can I use a big ass wine jug carboy to hold the methanol over a campfire for extreme heat? doesn't the container need to be pressurized so like precluding glass at all? would a metal container mess up the reaction? is extreme heat actually necessary or just preferred? thanks. most of my info is from this article: https://www.phxequip.com/resource-detail.40/comparing-the-different-formaldehyde-production-processes.aspx