Making Scent Article Bags

I've begun taking orders for scent article bags. I've made a couple for people. I'm making a bag for Hank's articles. Hank is a big boy and his articles are very large. They will require a very large bag. The bags have a frame that stays open or snaps shut. I made one for Jet that isn't quite as large as Hank's. Scent articles are used in Utility level obedience. The trainer puts their scent on an article which is added to a pile of articles. The dog picks out the article with its owner's scent on it. Jet has this exercise fairly well mastered. Hank is learning to do it. When training this exercise, initially the trainer adds some squeeze cheese to the scented article. Over time the cheese is faded and the dog must rely on the trainer's scent alone.