A couple months ago, my uncle mentioned he had my grandmother's old winemaking stuff in his garage and offered it to us. He dropped it off yesterday and these are the carboys he gave us. I have never seen this kind of plastic carboys before. You can see they are far from clean, but since they are plastic, I am not sure they can be fully cleaned/sanitized. Are these worth cleaning up and keeping? We have quite a few glass ones, and even in every day life I prefer to use glass over plastic, but thought I'd ask the experts.