This is a collapsible heavy-duty camping/sports chair with a cup holder in the arm rest. It's in really good condition except for one broken upper-rear connector. A replacement piece can be purchased on Amazon or eBay, or you can 3D print one if you have a 3D printer (or have a friend with one). There are 3D models already out there so you don't need to design your own if you don't want to.
Replacement connector from eBay:
https://www.ebay.com/itm/224086644828?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=5H8LVFMfS_W&sssrc=2047675&ssuid=8G-X6imISuC&widget_ver=artemis&media=COPY
3D Print Model:
https://www.thingiverse.com/thing:3894836