The Piggies seem to like these tunnels quite a bit. They fold up small, which is great. The one thing is that they poop in them and sometimes the poop gets stuck inside, so you have to rinse them out, which is fine because it also rinses their pee out.
This reviewer has 2-4 Guinea Pigs pets
Good product, Would have found it easier to put together if the pieces were labelled ! Water bottle leaks but apart from that guineas loveit