Depends on size of the midas, but ones that are less than full grown, a PVC pipe is an option. They come in very large inner diameter readings, and iirc can be cut with a simple hacksaw. Plastic or terracotta pots are also very easy to manage, although you may need a tool to cut the plastic pot. Regardless, if you cut or break the pot or pipe, be sure to sand down or rub down any sharp edges.
Personally, I find the terracotta more attractive especially the earthy tones. I'd also only choose the unpainted or unglazed terracotta as I am not sure if the paint or glazing is inert.
Just be sure to get brand new ones as terracotta will absorb water borne or air borne chemicals/pesticides whether in gardens, homes or left out in garden supply sheds. Give them a good soaking in a light bleach solution, scrub and rinse thoroughly and you should be fine.