I have a washcloth I got when I was like 6.. I’m almost 40. It’s a really nice mesh washcloth and somehow it only has one extra hole that shouldn’t be there, as well as a seam for the edging that needs to be fixed.
I’ve used it almost daily for my face that whole time.
But the oldest thing I have that I sort of technically use is a wheelchair from WWI. It functions as a chair in my living room. I don’t really think it counts, being furniture, though.