Someone in our small town has a 3D printer and has gotten approval from the hospital dist. and the county health dept. (we're required to wear masks in Oregon) to make shields. Because I load, unload, and distribute roughly 800 pounds of bread (around 500 loaves) every week, I wear my shield while doing that. It's hard to do heavy work wearing a mask, and the places I load and unload don't ordinarily have other people and certainly not people close to each other. I usually work alone. When I deliver to a facility that houses 70 "old" people, I wear a mask instead...even though I do not go inside the building, just unload onto their cart. I laugh about the "old" folks I deliver bread to, as most of them are far younger than my 78!