I'm leaning towards metal cones (stainless or aluminum) to aid in sanitizing.
Hi there.
I've never once had to sanitize my cone.. but that would be the reason I would try to go with stainless if I was gonna spend $.
Thing about bleach/vinegar plastic bottles is they're free and you can do all the experimenting you want. The taller like 2 gallon jug is preferred. When cutting out the bottom leave a tab.. for screwing through.. to the wall here, above a 5 gallon bucket (used to be lined with a bag that went in the trash later, now, mostly composted after the feral barn cat takes her share).. Just me processing, after death flap stops, scald before plucking.. I'm using left over rope from hay bales.. Come to think of it.. I have less control but I have JUST tied the ankles with no cone from the very start. I like the cone better. IMO, size does matter.. thickness counts.. for metal cones.. gutter minds!

Get rolled edges too, if you're going that route.. pricey.. I want one.. or two.
When a bird (chicken) was too big for my plastic bottle cone.. cutting a few slits around the top entry point allowed for more play around the butt area.. and I could feel the round shape kinda conform to the more oval chest. Maybe why some folks aren't liking them.. I've seen round and round with flat back, I think in metal.. I'm processing heritage chickens at different ages.
I even have a smaller 2 liter cone for bantams.
Getting the right size hole cut is my challenge.. mine (first prototype) is a little larger than I'd like and smaller birds may have their whole top half (like crop area) hanging out by the time they're done jerking.
The guy who used to harvest for me also hung them from the ankle.. slipknot style somehow (I need to learn how to tie knots as mine's a new type every time, kinda take out grocery bag half bow).. he said his CX would tend to break their wings flapping but the heritage not so.
Really if your just getting started.. the first time is always figuring out what works for YOU..
We tried using a folding table.. it needed stilts as I cannot sit down for this. I've now converted an old BBQ into my harvesting counter, and it's a good height.
I've seen one person who's cone stays on the tree, all innards and everything goes straight to the ground where the other animals including chickens, surely, leave not a scrap behind! Wish this was my style.. but violence would surely ensue in my pack.
Hang in there on finding the right information and best wishes on your worthwhile adventure!
