I borrowed the one we used. The reason it's not recommended to use it more than once is that they can spring a leak (I've heard a few hilarious stories of mw's dealing with leaking pools, but I'd rather that didn't happen to me!). But you can test it beforehand obviously, and they're pretty well made if you get one of the expensive ones. I chucked the liner. Storing it didn't seem worth it. Gave the pool back. Maybe I'll need to ask for it again one day...