I've done an invitro grow using quart sized canning jars before. Your method looks far better because they are so wide at the bottom. Even with the wide mouth canning jars the bottom is more narrow than the top. So when you pull it out it damages the mushrooms, even knocking them off sometimes. It makes it fae difficult.
Since this is made of plastic, I can easily put holes in it. And since it is so wide at the bottom, I can open it without damaging.
You have inspired me to start a new project.
Thanks for the feedback. You can generally obtain these containers for nothing at most grocery stores.