No idea. I think the pitch was for them to be biodegradable in a fairly short timespan, so I’d guess they don’t hold up well to sustained moisture. If you washed them immediately after using and then dry them off, you could probably get some reusability out of them. They’re not like that horrible paper shit that starts falling apart mid-use, but only ever used them after they were provided when ordering takeout - used em once and threw them out.