I use the “Camo Swivel Rest Stool” from BassPro. It is very uncomfortable by itself but I put a cushion on it. I like it because I can turn 360 degrees without making noise. This way I have access to every window of my portable ground blind. All of the other stools/buckets I’ve seen make a lot of noise. It also folds up small enough to put in the side of my backpack.
I did have a problem with this stool last year though. It was about 8 degrees outside and the plastic part of the stool got weak and broke and it left me laying on my back in the snow. I took it in to the store and they replaced it for free.