It was only used a few times as a changing room when going to a jetski; it was never used as a shower. I see that they are now $369 new.

Joolca’s sturdy Ensuite Double shower tent is a bit like a ship in a bottle; it looks impossible, but it pops up in seconds! What you get is not just a shower tent but a versatile two-room en suite. It comes complete with shower space, a separate dry changing room, windows for natural light, drainage and ventilation for a comfortable experience, a valuables compartment for security, a toiletries organizer for convenience, a removable laundry hamper for cleanliness, and interior and exterior towel lines for your comfort.

https://www.joolca.co.nz/products/ensuite-tent-double