Actually, this thread is about risking one’s life to spend a few pennies. Depending on the make coffee filters run 3-20 cents each. The last box of surgical masks I bought cost 23 cents each.
If your life means so little to you that you are going to cheap out on something like this, you will buy the cheapo filters (which I won’t use because they are too flimsy), as well as whatever you are using to attach the 4 filters to your face AND spend time fiddlefarting around with your makeshift mask before and probably during use to save or spend maybe 15 cents a day either way.
I’m too lazy to bother. I don’t bother trying to sanitize my disposable masks either. I know I am being very wasteful, and that’s alright with me at this point in time.